I had a chance to run a bunch of shots over the chrono today with my USFT. The goal was to make sure I'm still getting a fairly narrow extreme spread for the fill and refill pressures I've been using. With that goal in mind, I filled a little higher than I normally do, and kept shooting to a lower psi than normal. Keep in mind that this is an unregulated gun, using very low pressure (low pressure compared to about 99% of other PCPs out there)
For the first 10 or 15 shots I was kinda hit or miss on recording the tenth.
JSB 10.34
I typically fill to 1450 and refill at 1250. Per these numbers, that would give me an es of 17.3 for 40 shots (902 up to 912.1 and back down to 894.8).
It looks like I could fill to 1500 and refill at 1200 and get an es of 34.9 for 60 shots (887 up to 912.1 and back down to 877.2), at least when practicing.
However I slice it, pretty cool for an unregulated PCP using such low pressures. The trend with most guns these days seems to be the other direction, regulated and high pressure.
For the first 10 or 15 shots I was kinda hit or miss on recording the tenth.
JSB 10.34
I typically fill to 1450 and refill at 1250. Per these numbers, that would give me an es of 17.3 for 40 shots (902 up to 912.1 and back down to 894.8).
It looks like I could fill to 1500 and refill at 1200 and get an es of 34.9 for 60 shots (887 up to 912.1 and back down to 877.2), at least when practicing.
However I slice it, pretty cool for an unregulated PCP using such low pressures. The trend with most guns these days seems to be the other direction, regulated and high pressure.