Comparing the T05 trigger to the T06: Part 3

by B.B. Pelletier

Part 1
Part 2

RWS Diana 34 Panther
Part 1
Part 2
Part 3
Part 4

Pro-Guide spring retainer system for RWS Diana rifles: Part 5 — The RWS Diana 34 Panther
Part 5

I’m testing the T06 trigger today using the accuracy test as a means to evaluate the operation of the trigger. The object is not to see how accurate this RWS Diana model 34P is. We already know that from tests run long ago. But as I try to shoot groups with the gun, I can get the feel of the new trigger better than any other method. So, today is about a trigger and not about this air rifle.

Of course, I’ve already used the trigger a lot in the velocity testing I did a couple days ago. Now, however, I’ll be holding tight on a small target, and any aberration in the trigger will come though loud and clear. This is where the rubber meets the road!

New BKL adjustable mount
I’m also testing the new BKL adjustable scope mount at the same time, and the next report will be exclusively about that. I showed you the new mount in Part 1, but what I didn’t show you was the bubble level that’s attached to the left side of the mount base.

The optional BKL bubble level is mounted on the left side of the new BKL adjustable scope mount. This view shows the rear of the mount raised up to compensate for this rifle’s barrel droop.

With this level attached, I can sight with one eye and watch the bubble with the other. I can’t see both at the same time, which is why a scope with an internal bubble level would be so desirable, but at least I don’t have to move my head to see the bubble like you do with some other levels. I’ll be reporting on it when I cover the mount in the next report.

Back to the accuracy test
I learned in the past that this rifle really likes 7.9-grain Crosman Premiers, so instead of fooling around with many different pellets, I selected just these pellets for the test. That way I could forget about trying to make the rifle shoot well and concentrate on the trigger.

Ten Crosman Premier lites went into this 0.443-inch group at 25 yards. It’s a little larger than Roosevelt’s head on the dime but smaller than the entire coin.

Though I’m only showing you a single 10-shot group, I shot much more than that. I probably shot 50 shots for today’s test, on top of about 20 the day before when I was checking out and adjusting the new mount. With all this testing, I became very familiar with the T06 trigger.

How the T06 trigger differs from the T05
The T06 operates differently than the T05 did. The T05 stopped cleanly at stage two and held there until the instant the sear released. There was no feeling of movement once stage two was engaged.

The T06 also stops cleanly at stage two, but as you continue to pull you can feel the trigger moving through the stage. Normally this is called creep, but it is absolutely smooth with no pauses or hesitations, and it doesn’t fit the popular definition for trigger creep. In fact, this movement becomes entirely predictable and something a shooter can learn to live with.

Something else about the stage-two pull on the T06 — on most triggers, when you pause part way through stage two, back off and then return to it again, as much of it that was pulled through is still gone. You’ve advanced the trigger or shortened the stage-two pull, whichever you prefer. Not so on the T06.

Because the Diana 34P requires so much technique (the artillery hold) to shoot accurately, I found myself stopping several times before the trigger released to take another breath. When I did that, naturally I relaxed my trigger finger as well. Then, I had to settle myself again before returning to the trigger. What I found when I got back on the trigger was that it had reset itself to the start point. The full trigger-pull was restored. This is what I want all triggers to do, because anything else means an unpredictable trigger that could release before I’m ready. From that standpoint, the T06 is a very nice trigger. The T05 didn’t have the problem of pulling part way through stage two, so of course it always acted like it had just been set whenever you came back to it as well.

The bottom line
Diana has made a change with the T06 trigger. In my observation, it isn’t any better or worse than the T05; it’s just different. If you want a metal trigger blade, the T06 has it. If you want adjustments, the T06 has more of them. I wasn’t able to eliminate the travel in stage two, but that doesn’t mean it can’t be done. I spent all of 30 minutes adjusting the unit. Someone who is willing to put in more time can probably discover secrets that I didn’t find.

The bottom line as far as I see it is the T06 trigger is now here and the T05 is a thing of the past. I alerted you to the difference between the T05 and T06 pistons, so you know they go together and a T01 trigger can also use the same piston as the T05.

The new trigger is nice and predictable. It has the features I’ve mentioned, and they all work well. If you wind up with one on your next Diana airgun you should be satisfied with it. But if you currently own a T01 or a T05 trigger, I wouldn’t plan to change it.

Comparing the T05 trigger to the T06: Part 2

by B.B. Pelletier

Part 1

RWS Diana 34 Panther
Part 1
Part 2
Part 3
Part 4

Pro-Guide spring retainer system for RWS Diana rifles — Part 5 The RWS Diana 34 Panther
Part 5

You’ll notice that I’m doing something different in today’s report on the RWS Diana model 34P T06 trigger. I linked not only to Part 1 of the T05/T06 trigger report, but also to the entire RWS Diana 34P report (it used be called the 34 Panther) that was done way back in 2007. I did that because in changing the rifle to the new T06 trigger, I also had to replace the piston. (In Part 1, I mentioned that the T06 trigger requires a different piston to work.)

I also linked to the report where I installed and tested the Air Venturi RWS Diana Pro Guide spring retainer system in this rifle. That single link takes you to the fifth report in an entire series on just the Pro Guide, and that tune is still in this test rifle.

On to today’s report
When I removed the old piston from the rifle for the new trigger installation, I saw that the edge of the seal had been chipped in a couple places, which might have had an effect on the old velocity figures. Although the mainspring remains the same (it’s that Air Venturi Pro Guide upgrade kit I told you about) for both pistons, I have no way of knowing if the piston seal was damaged when I did the velocity test before, so I’m doing the test, again, today.

Here you can see the main cut near the top of the piston seal and a smaller one at the 3 o’clock position. What looks like a third nick on the other side of the seal is just some excess material sloughing off. Although these are very small imperfections, they might have caused some loss of velocity.

You saw the T06 trigger adjustments in the last report. Here’s what the T05 trigger looks like.

The T05 trigger and piston shown together. Compare them to the same picture of the T06 trigger and piston in the last report.

Some of the more anal among you may wonder whether the new seal made it into the gun okay this time, or am I faced with yet another damaged seal. Well, knowing what happened last time I was very careful to tuck in the new seal past all sharp edges of the mainspring tube as the piston slid in, which is usually where such damage happens. I feel reasonably certain that the new seal isn’t damaged. If testing proves otherwise, I’ll pull the piston and examine the seal.

Something new
Another reason I’m doing the test this way is because of a new BKL product. Last week, I told blog reader Kevin about a new BKL adjustable low mount, and now I’m going to show it to everyone. The mount I’m using here is a prototype, but the production mounts are very close to being completed and shipped and should be available for sale in less than two months.

This new mount is adjustable for height, so it’s an anti-droop mount. And, this RWS Diana 34P is the very gun I used to test the original Leapers UTG Diana drooper mounts. This is the rifle that shoots 21 inches low at 20 yards (that’s 6 inches low at 35 yards with the elevation cranked up as far as it will go)! What better gun on which to test an anti-droop mount than the very one that droops the most of any I’ve tested?

The new BKL adjustable mount is lower than most adjustables, yet it allows a 50mm objective to clear the spring tube when full droop is applied. The black post at the rear of the mount controls the vertical adjustment. This mount is a prototype that hasn’t been anodized black.

I’m not going to cover the mount today, but I’ll do a special report on it after the accuracy testing is completed. Remember, folks, what we’re really looking at in this series is the performance of the new Diana T06 trigger. But time and circumstances have allowed us to also look at some additional things as we do.

Today’s report
We’re going to establish the velocity of the rifle with the new piston and seal. I didn’t expect to have any velocity change from the old piston until I saw that seal. As I report the findings, I’ll remind you of the velocities obtained with the same pellets back in 2008 in Part 5 of the Pro Guide test (after it had been installed in this rifle).

Crosman Premier lite
The first pellet I tested was the venerable Crosman Premier 7.9-grain domed pellet. This pellet proved to be quite accurate in this rifle, and I expect it to continue to be accurate in this test. In the original model 34, as it came from the factory, this Premier pellet averaged 919 f.p.s. After the Pro Guide was installed in 2008 in the gun with the T05 trigger, the average velocity increased to 936 f.p.s. When I tested it this time, the average was 956 f.p.s. The spread went from 937 all the way up to 971 f.p.s., so the gun is getting used to its new situation, but that’s still a small increase.

RWS Hobby
The next pellet I tried was the RWS Hobby. In the factory 34, Hobbys gave me an average of 1021 f.p.s. After the 2008 installation of the Pro Guide system, the average was still 1021 f.p.s. With the latest T06 trigger installation, the average is still 1021 f.p.s. Apparently, that’s a speed this rifle likes for Hobbys. The spread this time went from 1011 to 1031 f.p.s., so just 20 f.p.s. That’s pretty consistent for a springer.

H&N Baracuda Match
The last pellet tested was the H&N Baracuda Match. These pellets underwent a weight change over the past two years; although they became lighter, they still registered lower velocity with the latest tune. In factory trim, they averaged 820 f.p.s.; after the Pro Guide was installed, that increased to 825 f.p.s. With the latest tune, they now average 801 f.p.s., with a spread from 795 to 808 f.p.s. That’s a very tight 13 foot-second spread; but as you can see, the average has fallen. I do believe this is a different pellet than the one I used before even though the name is the same, but there’s no way to prove it and it doesn’t matter anyway. The current pellet is all you can buy, so it is what it is.

Based on the results of this test, which I verified with additional shots after the chronographing was completed, I proved that the gun was shooting as well as could be expected when the T05 trigger was installed. The cuts on the piston seal appear to have made no difference. There has been almost no change with the new installation.

The T06 trigger
My initial impressions of the T06 trigger is that it is a fine sporting trigger, but it offers no substantial improvements over the T05. This trigger has some creep in the second stage that I’ll try to adjust out. The T05 had zero creep. Its pull can be adjusted lighter than the T05 pull, but it’s somewhat creepy, which more than offsets the lighter breaking weight.

The real test of a trigger comes when you’re trying to shoot for accuracy, so I’ll reserve final comment until then. After the accuracy test, I plan a special report on the new BKL adjustable low mount to show you all the features. By that time, I’ll have hundreds of shots on the gun with the scope mounted, which will serve as a test of it’s stability. And, there’s more…but you’ll just have to wait.

Comparing the T05 trigger to the T06: Part 1

by B.B. Pelletier

A new airgun site
Pyramyd Air’s new beta website is going live today! The top request we get from customers is for a way to organize search results and to limit searches to certain criteria. Your wish is our command! But that’s just the beginning. There are so many new things that it would take the whole blog to cover all of them. Instead, I’ll let you discover all the wonderful changes on your own. We’re in the process of having two videos created that will give you a tour of the new site and its many features. We’ll give you a heads-up when they’re available. In the meantime, click here to be transported to our new site. Still want to use the old site? It’s still in the same place.

Now, on to today’s blog.

This will be a difficult report to do, as there is a lot of worldwide support for the new Diana T06 trigger — from people who have never seen it but are ready to spring to its defense if necessary.

I’ve used the T05 trigger that comes on many of the current RWS Diana air rifles and find it to be a great airgun trigger. It’s certainly not as adjustable as Weihrauch’s Rekord trigger, but when something works right why does it need to be adjusted? I suppose I’m less critical of trigger adjustments because of all the different guns I shoot. I can understand why the owner of a single gun would want it to be exactly right. Since I never get that, I guess the importance is lost on me. What I mean is that I understand it in my head but not in my heart.

I selected an RWS Diana model 34P as my testbed. The reason is that the model 34 is very popular, and it’s evolved over the years into a pretty nice spring-piston rifle. I remember the 34s of the 1980s that were crude and rough by comparison to what you get today. The 34P is identical to all other RWS Diana 34 models, except that it has a black synthetic stock.

To test the triggers, I first shot the rifle with the T05 trigger that came standard until I got used to it. Next I will install the T06 trigger and piston that were generously supplied by Umarex USA.

The RWS Diana 34P breakbarrel rifle was used to test both triggers.

The T05 trigger came with the test rifle. The only adjustment screw is inside the trigger blade, and it adjusts only the length of the first stage.

There’s no reason to test the rifle for accuracy or velocity, because the trigger doesn’t affect either of these attributes. If the original trigger had been really bad, there could be an improvement in accuracy due to a more reliable sear release point, but such is not the case. The T05 trigger is crisp and positive in all respects. The T05 is already so nice that the T06 has a lot to live up to.

The RWS Diana model 34 has been in production since 1984, and it began life in a plain wooden stock with the T01 trigger. The trigger blade of the T01 was made of stamped metal. It worked, but it was hollow in the back so it looked cheap. However, the T01 trigger was very adjustable and someone familiar with it could adjust it to a remarkable release.

Sometime around the year 2000, Diana changed the trigger design to the new T05 that had a solid trigger blade that was even straighter than the T01 blade had been. Unfortunately for Diana, they made the new trigger blade — and a couple other obvious trigger parts like the new safety bar — from plastic. Apparently, no one at Diana remembers the hue and cry back in the 1970s when FWB sold their 124 and 127 sporting rifles with plastic trigger blades. Those who do not know history are doomed to repeat it.

Not plastic
The T05 TRIGGER is actually not plastic! The trigger BLADE is plastic, but the blade alone is not the entire trigger. The actual unitized mechanism that is the trigger contains many metal parts. The way the trigger unit is designed, the trigger blade does not touch the sear, though if you listen to all the wounded souls whose lives have been ruined by that “plastic trigger,” you might think that it does.

I remember as a kid our old 1940s Kelvinator refrigerator had a nickelplated metal locking handle on the door. My fridge today, which is three times larger and far more efficient, has a plastic handle and the door is held shut by a magnet. Should I stop eating in protest? What about those plastic bumpers on today’s cars? Should we all walk because we no longer have steel hanging out in front and behind?

The T05 trigger works just fine. The one on the test rifle releases crisply at 2 lbs., 10 ozs. and it’s good enough that I was able to shoot dime-sized 10-shot groups at 20 yards and sub-half-inch groups at 35 yards. Read about it in this four-part report.

There’s only one adjustment on the T05 trigger, and aside from the plastic trigger blade, it’s the focus of most of the criticism. The screw in front of the trigger blade controls how long the first stage is, and that’s all you can adjust. Fortunately, the pull weight and let-off are very nice as they come, but there’s no easy way to adjust them. When people feel they have no choices, they don’t like it.

T06 trigger
The T06 trigger, by way of contrast, has adjustments for the pull weight, the length of the first stage and the sear engagement. The T06 trigger has three adjustment screws. The one in front adjusts the length of the stage-one pull. The screw behind that, which is buried deep inside the aluminum trigger blade, is for adjusting the sear contact (I think) and a screw located behind the trigger blade is for adjusting the weight of the trigger-pull.

The front screw on the T06 trigger blade adjusts the length of the first stage pull. Deep inside the hole behind it is the screw that adjusts the sear contact, I believe, and the screw behind the trigger blade is for adjusting the pull weight.

Thankfully, Diana also replaced the old plastic safety bar with one that looks identical and made from aluminum. I think they got the message about plastic.

The T06 trigger requires a different piston to work. It looks the same as the one in the T05 guns, but the lockup surfaces on the piston rod are different and must be configured to mesh with a T06 trigger. Making the switch isn’t just a matter of replacing the modular trigger unit, but the piston, as well.

The T06 trigger and piston used in this test were provided by Umarex USA.

I haven’t seen an owner’s manual for this trigger, so everything I’ll tell you will come from trial and error. My next job is to tear down the 34P and swap in the T06 trigger and piston for the T05. Following that, I’ll shoot the gun extensively, adjusting the trigger as I go. Although I’ll give the weight of the T06 trigger-pull, most of this report will be subjective — my observations after shooting the rifle with both triggers.