I finally got my Chrony set up and checked the vel on my Discovery.
It is bone stock except for a mellon adjuster. My question is, what should I be getting
for top fps with a 2000psi air fill?? With my adjuster 1/4 turn from spring bind,I am getting 650, 630fps.
I would have thought it would be better. Any suggestions??
QB78 Deluxe Rich from Mich tuned
crosman 2400KT custom shop with added Discovery air tube
QB79 Rich from Mich tuned
QB2078 mike melick tuned
.22 and.25cal Marauders
Life member NRA and Texas State Rifle Assoc.
I can say that my bone stock .177 disco will push 7.9grain CPHP's across the chrony at an average of 985fps.
And I have a souped up .22 disco that I built myself from parts that is like your, in that the adjuster is running at max turns to get the most fps.
And it will put .22 H&N Barracuda 21.14 grains across the chrony at an average of 860fps.
So I'd say your gun is leaking air at every shot or your chrony is on the fritz.