The AEA and JTS pellets seem to like a little more speed than the traditional selection. Maybe a little hot at 970-980. I'd be curious to see a target shot at 940fps.
It all depends on your set up. Mine is a 700mm .25 cal with the standard regstack progression of 2 on 3. My belief is that pellets require a very brief, high powered SLAPof air. This minimizes the amount of destabilizing air trailing the pellet. Even so, my Mora's 2nd reg is set to only 100 bar and my dwell is only 3/4 of a turn off completely closed. Even so, I'm shooting AEA 29.5s at 975fps and producing these types of results at 100 yards.
Really nice targets you got there!! What ES/SD are you getting? Mine is a .22 600mm and it shoots amazing! The only thing I don’t seem to get a handle on is the spread… ES 15-20 and SD 3-4 for me, would really like to get that tighter… dwell is also set fairly tight…
In order to achieve very low SD and ES you need to be very meticulous in your tuning approach. While the Mora is generally an extremely easy gun to tune, "fine" tuning will require some time and work. Currently during testing, I'm seeing 2-3 SD and as much as 14 ES depending on the speed and the pellet I'm shooting. However, for serious practice and competition, I will always return to the AEA 29.5 grain Center Punch pellets at 970-975 fps because that is where I get my best overall results. As a starting point for that tune I know exactly the 2nd reg pressure (100 bar) needs to be and the approximate position for the dwell adjuster (on my gun that's six holes from closed). However, because I'm using a 700mm barrel, your settings will be different(most likely a few bar higher on the reg), if only slightly.
Thanks Joe!!! Decided to pull the reg and found 25 equally thick Belleville washers… seems weird…
Another question for you (sorry): what do you mean with “standard reg stack progression of 2 on 3”? I went with (()) and 24 washers (what I have in my p3…) when putting the reg back in, no idea why there where 25 in it but maybe I’m missing something?!
Nope, not weird at all. While you have it out, polish the washers then arrange them in the type of stacks that fit your power requirements. 2 on 2s for lowest power 2 on 3 for medium range and 3 on 3 for highest power. It's alright to have washers left over.
Thanks!!!! The (()) seems to be working fine at 150b buuut gonna try this stack next! Always thought you gotta go with stacks of equals, otherwise the lower count pairs/washers will go flat at some point?! Anyway, very helpful!
Sensitivity will depend on how the reg is stacked, the differential value between regs 1 & 2 and the speed you're shooting. At the standard differential value of 50 bar, the low pressure stack should produce the highest sensitivity at the lowest speeds. My gun which is set up as a 2 on 3 washer stack (medium power stack) is very sensitive to changes in the 2nd reg. At around 90 to 100 bar, the tiniest bump will produce a 10 fps difference. I don't pay any attention to the reg gauge as gauges in general are notoriously variable. I only use it when noting a general reference point. I use my chronograph to do all my fine tuning.Adding another question: how sensitive is your reg to adjustments? When I up the pressure it feels like I need to turn quite a bit before the gauge does something, like nothing happening according to reg gauge if I do less then at least 1/8 of a turn. And then the needle jumps almost 10b… also noticed the needle jump when the reg is refreshing, will try to capture on camera… hopefully it’s just the gauge being wonky and not the reg…
Also lmk in case you don’t appreciate me sidetracking your post
There are 25 because the Mora has greater power range than the P3. The standard Mora stack is 2 on 3 which is equal to 5 stacks in the Mora.
Makes sense! I’ll play with a bit more with the (()) stack since I’m not going to go above 150ish bar and the strings look better and better with more refinement with the valve and reg like you suggested:
