After trying a lot of different springs and a couple different hammers, I've ended up at around 270-280psi with the IVG in two turns. I'm thinking the fact that it's a Minicocker-spec Trilogy body might have something to do with the higher operating pressure?
It's pretty consistent at the moment, around 270fps, but I'll finish tweaking at the field the next time I'm there... my little Radarchron is good enough to ballpark stuff but I find the red chronies are better at reading consistently.
I also swapped out the u-cup seal for a 009-70 buna, seems to have resolved my intermittent barrel leak. (Or it's a coincidence.)
It's pretty consistent at the moment, around 270fps, but I'll finish tweaking at the field the next time I'm there... my little Radarchron is good enough to ballpark stuff but I find the red chronies are better at reading consistently.
I also swapped out the u-cup seal for a 009-70 buna, seems to have resolved my intermittent barrel leak. (Or it's a coincidence.)
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