by Tom Gaylord, a.k.a. B.B. Pelletier
Thank you for being so patient with me on this Walther 1250 Dominator report. I had to suspend it while I was back in Maryland; but now that I’m home, I can start up again. Today is velocity/power day, so we’ll learn a lot about this air rifle.
Filling with air
To fill the reservoir, you first remove it from the rifle by unscrewing. Then, it’s screwed onto a brass adapter that’s screwed into a 300-bar DIN hole on a carbon fiber tank or scuba tank valve.
You fill the reservoir up to 300 bar, or 4,351 psi. The only way to get that much pressure is to use either a carbon fiber tank or to connect the reservoir directly to an air compressor or hand pump that goes that high. My carbon fiber tank was holding less than 3,000 psi when I conducted this test, but fortunately the rifle has a broad power band. Even though I can’t fill the reservoir all the way, the gauge on the tank still reads in the green. I’ll get fewer shots, but they will be at the same velocity. It’s just like a car that goes no faster when its gas tank is full or nearly empty.
However, I cannot give you a shot count in this report because I’m not filling the reservoir all the way. That will have to come later.
As an observation, I would use the Air Venturi female DIN adapter with this reservoir, so I could use either a hand pump or carbon fiber tank to fill the reservoir.
Trigger and safety
The two-stage trigger is adjustable for the length of the first stage. You can even adjust it out, and have a single-stage trigger. The adjustment doesn’t alter the force required to release the sear in stage two. On the test rifle, that broke at 2 lbs., 8 oz. with stage one taking 6 of those ounces.
Stage two has a definite feel of the pull through to it. It’s not creepy, in the sense that it stops and starts, but is rather a smooth pull-through that can actually be felt. It’s not bad — just not glass-rod crisp.
The safety is automatic on cocking, but it’s designed to go off easily with a downward swipe of the thumb. After several shots, I found myself not even thinking of it.
This rifle will have those with sensitive ears running for their hearing protection. There’s no attempt to muffle the discharge, so you hear the full effect of the power. It’s not as loud as a .22 rimfire; but if you shoot indoors, I can imagine shooters using that as a description.
It’s fully as loud as any other pneumatic of its power class when no attempt is made to attenuate the discharge sound. Thirty years ago it would have sounded normal; but in this day of shrouded barrels, it stands out.
This Walther is rated to 28 joules, which is just a bit more than 20.6 foot-pounds. There’s no mistaking the spec, for it’s written on the right side of the receiver. That is a lot of power for a .177 pellet rifle to generate, and of course you’ll need heavy pellets to achieve it. So that was where I started the test — with Beeman Kodiak Match 10.65-grain pellets. To achieve 20.6 foot-pounds (28 joules), this pellet needs to exit the muzzle at about 933 feet per second, according to Pyramyd Air’s energy calculator.
But the average velocity I recorded for this pellet was 968 f.p.s., which works out to 22.16 foot-pounds or 30.05 joules. So, the rifle is more powerful than advertised. The average velocity went from a low of 965 to a high of 972 f.p.s., which is a tight 7 foot-second spread.
Next, I tried the popular RWS Superdome pellet. It averaged 1005 f.p.s. from the test rifle, with a spread from 998 to 1013 f.p.s. That’s a 15 foot-second spread, and the energy generated is 18.62 foot-pounds at the muzzle. As you can see, that’s a big drop-off from what the heavier Kodiak Match pellets generated. Precharged pneumatics often generate their best energy with the heaviest pellets they can manage, so this comes as no surprise. However, it will only be after we see the accuracy of these test pellets and perhaps some others that we will select an optimum pellet for the rifle.
H&N Match Pistol
As a final pellet I selected the lightweight H&N Match Pistol pellet. I wanted to test two things here. First, how would the rifle handle lighter pellets; and second, would the magazine handle wadcutters smoothly. It actually did feed these pellets smoother than both of the domes, so that part of the test was a success.
The average velocity was 1018 f.p.s. with a spread from 1016 to 1020 f.p.s. That was the tightest velocity spread of all — just 4 feet per second. The average energy for this 7.56-grain pellet was 17.40 foot-pounds at the muzzle, so another power decrease came with this lighter pellet.
Reliability and pellet feeding
Any time I test a repeater, I always wonder if the gun will feed pellets smoothly and how the magazine…or in this case the clip…will handle the pellets. There are no concerns with the 1250 Dominator, though; because the pellets go into the clip easily, they stay in well and the clip goes into and comes out of the receiver with great ease. The bolt sometimes hangs up on the forward stroke, but that’s due to the newness of the gun — not a pellet feeding problem. I believe it’ll go away as the action is broken in.
The clip is long enough to accept the Beeman Kodiak, which is a long pellet, so I have no problem with it. And it feeds wadcutters well, so pellet shape is not a problem, either.
Observations thus far
The Walther 1250 Dominator is certainly a different PCP. It has a lot of synthetics and a different shape than is thought to be conventional, but it holds very well — hanging muzzle-heavy. The profile may appear different, but it holds like a rifleman’s gun. I can’t wait to see it shoot!