About a year ago and after about 12000 shots I decided to give my BSA a bit of TLC. I polished everything on the inside, put in a different (smaller) spring, new seals, etc. Up to 50m it is as accurate as any other springer I've used so far. Lock time is very quick, and the rifle is very consistent. This weekend was the first time I ever chronied it. Power is lower than I thought it would be, but it doesn't matter. Chrony string showed an average of 698 ft/s, but the difference between highest and lowest were only 3,5 ft/s !!!
But the biggest surprise of all was Stefan's QB78.
10 shots showed 2 ft/s from high to low, with average of 664 ft/s.
Not bad for a stock standard CO2 rifle!!!!