by Tom Gaylord
Writing as B.B. Pelletier

Hatsan 85
Hatsan 85 Sniper rifle combo.

Part 1
Part 2
Part 3
Part 4
Part 5

This report covers:

  • Bipod
  • Trigger baseline
  • Trigger is naked and exposed!
  • New trigger screws
  • Buldawg’s instructions
  • Can’t waste any time
  • Got it!
  • Results
  • One more accuracy test

We’re back with the Hatsan 85 Mossy Oak Break Up combo, and today we will look at changing those screws in the trigger unit, plus get an update on the bipod. This is turning into a long series, and I hope that newer readers appreciate the depth of detail they are seeing. I normally do not look at any one airgun this close.


I was contacted by Hatsan USA and informed that bipods have been removed from these combo packages. They said that decision was made two years ago and were surprised that I got one, but sometimes decisions proceed actions by a very long time in retail. If the supply chain is a long one, as it certainly is in this case (Turkey to the U.S. to the dealer to the customer), then it takes a long time for things to rectify. But the bottom line is there shouldn’t be a bipod with the gun anymore, so I will forgo that test. I did not hold out much hope for it anyhow!

Trigger baseline

When I started this work the trigger released after a 5 lb. 14 oz. pull, depending on how the gage was used. The second stage was very long but fairly crisp. I did not adjust the trigger so far, so what you see today is where it was set at the factory.

Before I continue I want to mention that the trigger return spring screw was not touched. It was set fine at the factory and I saw no reason to adjust it any farther. In case you are wondering, it is a separate headless screw located behind the trigger blade.

Reader Buldawg76 was kind enough to send me two longer trigger adjustment screws he had modified for the Hatsan trigger. When I’m finished with them I will send them back, since this rifle will go back into the Pyramyd Air inventory as a used gun at the end of this test.

He instructed me to install both screws and set them so their heads were in the same position as the factory screw heads. So the first thing I did after removing the action from the stock was photograph the trigger. This step is not necessary and I advise against it, as you will soon see.

Hatsan 85 trigger right side
The right side of the Hatsan 85 trigger. As you can see, the adjustment screws appear to be adjusted in as far as they will go. You can also see that as the trigger blade is pulled to the rear, it rises in the trigger unit. This is where the difference in my trigger-pull measurement in part 2 comes from!

Hatsan 85 trigger left side
The left side of the Hatsan trigger.

Trigger is naked and exposed!

While the Quattro trigger is unitized, it is also very exposed and in my opinion, is not a trigger for most owners to work on out of the stock. Too many things can pop off or slip out and get lost, rendering the rifle inoperable. While these parts are not as loose as some I have seen in similar designs on other brands, they are still too exposed for the casual worker. So if you decide to do this, my advice is to leave the action in the stock.

New trigger screws

The new trigger screws are about 1/4-inch longer than the factory screws. Bulldawg has rounded their tips so they have little friction with the parts they contact.

Hatsan 85 trigger new screws
The factory trigger adjustment screws are on the left. The new screws are longer and have thinner heads. Their tips have been rounded for less drag.

Buldawg’s instructions

Buldawg told me to install the new screws so their heads were the same height as the factory screws. Obviously I will not be able to do that because the factory screws are all the way in. When I removed both factory screws I verified that they were, in fact, screwed down tight. So I installed the new screws so they were sticking up enough that I knew they were not nearly as far in as the factory screws. Then I installed the barreled action back in the stock and began testing.

Can’t waste any time

One thing I lack is time to fiddle around. I have to put out a blog every weekday, and gathering the material to write about takes from 2 to 4 hours, minimum. Then I have to write and edit the blog, take all the pictures and Photoshop them for the blog, then schedule the blog for publishing as I do my final edit. On a good day this all takes 8 hours. Some days it takes longer — a lot longer. I simply haven’t got the time to sit around and fiddle with things, to see what works. If I invest 3 hours in something I’m darn sure going to write it up, because there’s another blog coming tomorrow.

So, I was counting on Buldawg’s directions to get me through this fast enough to stay on schedule. And they did! Buldawg had told me to put the new screw heads at the same height as the factory heads as my starting point, but now you understand why I could not do that. So, instead I installed them out far enough that all adjustments had to be done by screwing them in.

Hatsan 85 trigger new screws installed
The replacement screws were left high enough that all adjustments would be done by screwing them in.

Buldawg also told me to adjust each screw slowly — by 1/8 turn per try. But the screws were so far out that I turned them in a whole turn per try until reaching the point where the adjustment started to get critical. On the first test with the new screws as installed, I could feel a short first stage, followed by a heavy creepy stage two pull. I turned the front screw in a whole turn and found the first stage was now much longer and stage 2 was unchanged. Then I turned the rear screw in a whole turn and stage 2 became lighter, but still had a lot of creep. The first stage was also shortened when I adjusted the rear screw.

After this test, I adjusted each screw in turn, firing the gun after each adjustment. I was still adjusting each screw entire turns each time. However, after three whole turns on each screw I could feel the trigger pull was approaching what I wanted. That’s where I slowed down.

Buldawg told me I could get the trigger release down under one pound with these screws. That might be nice for some shooters — especially if this is their own rifle. For me, though, one pound is too light. I only have a couple spring guns adjusted that light and those guns have triggers that are far more precise than this Quattro. On a sporting spring rifle like the Hatsan 85, I feel a trigger that releases crisply at something between 2 and 3.5 lbs. is probably right for me.

Got it!

The final three adjustments were each less than an entire turn. I wanted a definite first stage, followed by a lighter second stage that was crisp. And I got it. Stage 2 now breaks cleanly at 2 lbs. 10 oz. That is a reduction from the 5 lbs. 14 oz. factory setting. The trigger is now as crisp as a glass rod breaking — no hint of movement before the release. I couldn’t ask for anything better in a spring rifle of this power. Buldawg was right about the Quattro trigger needing these longer screws for the adjustments to be fully effective.

Hatsan 85 trigger new screws adjusted
Once the replacement screws were properly adjusted, you can see how far in they went. Note that the front screw (stage one) is now in farther than the stage two screw.


I don’t often get such a positive result as what we see today. Buldawg was absolutely right with what he said about these screws. I do think that if you decide to try it yourself, you can just leave the action in the stock. I only removed it to show you the trigger mechanism.

One more accuracy test

The Hatsan 85 is now shooting so well that I feel it deserves another accuracy test. This time I know a lot more about the rifle than before, plus the trigger is now optimum. Let’s see whether this makes any difference.