I just got bought a used Sniper HR .22 and have a question. It's been so cold here, that I just couldn't stand to set up my chrony and check things out, but I have a question about shot count. Reg pressure is ~145, and hammer spring is .075" from flush, transfer port on #6 (wide open). This is a .22 with a 480cc carbon fiber bottle. I'm only getting about ~40-50 shots on a 240BAR fill. Is this normal? I thought I saw a review that said something like 80-100 shots. I know this is nearly max power on this rifle, or at least it looks pretty close. I don't really care about the shot count, but I was wondering if this is normal