@kdog - Keith, I agree. I think its very interesting how accuracy can change dramatically with only small differences in speed. The Bantam that you sold me shot the 10.3s at 950 on High, and 920 on Medium (Low was around 800fps). You wouldn't think it makes that much difference, but it was half dollar sized groups at 50 yards at 950, and penny sized groups at 920. I found out (from some guys here on AGN) how to reduce the HST, lowered the speed to 895 on Medium, and now it gets dime sized groups at 50 yards with the JSB 10.3s.
170 seems super high, is the gage broken? Should be between 100 and 120 bar I would think...