Stumbled on something interesting
Well i was happy with my set up for about a week and then wondered if it would still dump the tank with no restrictor and no washer behind the top hat. So the set up was pw 0 slide on 1, ttth no restrictor, 95 gr hammer, jds reg and adapter set at 2300 psi and .020 washer behind top hat 32.4 gr 769 avg for 42 fpe. 25.4 gr 835 fps for 39 fpe. Now without the washer 32.4 gr 762 41.7 fpe and the 25.4 stayed almost the same. Now for the interesting part! I put a .040 washer inbetween the top hat and had a very noticable decrease in the noise level and not alot of loss in velocity. The 32.4 gr dropped 745 fps avg for 40 fpe. The 25.4 gr jsb actually lost more velocity than the ej. They dropped to 785 fps. For 35 fpe. I thought it was interesting that the ej 32 gr pellets lost less velocity by addingthe thicker washer. I figured it would be proportional.
All Replies
Viewing 2 replies - 1 through 2 (of 2 total)
Yes you are wasting air. I run shims under on both my regged guns to find the spot where fps starts to drop. Then I make it just a tad bigger to get it to where it doesn’t drop.
This adds shot count and drops the sound level also.
The point of adding a shim is you want the breech to be against the frame and not have a gap. With a 1 piece top hat it’s the only way to fine tune it.
You will not get tank dump with a reg setup. Also the PW will have no effect if setup right.
Viewing 2 replies - 1 through 2 (of 2 total)
- You must be logged in to reply to this topic.
If i get time this evening i am planning to make a .030 and a .035 washer too see where the perfect spot is. I have it back to very quiet and accurate with about 41 fpe with the ej. Spot on at 40 yds again. I spotted another ground squirrel today and will be smoking him with this setup as soon as i can get the sights on him.