Today I finally got a chance to run the Big Ed B51 across the chrony to dial in my fill pressures. Ed had told me to start out around 2100 psi and work on it from there, so I started at about 2300psi to see what kind of quiet low velocity shots I could get from the new machine. At 2300 psi the gun was shooting Crosman 10.5 grain Heavies just under 400fps, little slower than I wanted for the yard, but so quiet. With every shot fps picked up by 2-6 fps on average, and it finally got to the point after I had reset the chrony 2 times (32 shot memory) that I got kinda bored...so from a 2300 psi I got about 70 shots at utra low power. I stopped when I got to the840's, hooked up my pump and pumped a couple strokes till the fill valve opened....the gun was at 1700psi, this is where I started my chrony string:
this graph is actually plotted backwards, shot 34 is actually shot 1 and visa versa.
End pressure 1200psi, and about 35-40 quick pumps to get it back up to 1700 or so...about a pump per shot...nice! What amazed me is before this string when I was just trying to shoot some air out so I could start running strings I was using cheapo Crosman wadcutters(7.5 grain?) these lighter pellets were shooting well into the mid-high 900fps range, but still not much louder than your average pumper bbgun on say 4-5 pumps. This gun continues to impress me, almost as much as my earlier B50 DE-pressed me. Ed recrowned the factory barrel and it shoots some real one holers at the range I've been able to shoot it at, just as accurate as anything else I've owned...'cept for maybe the Tau. The trigger still bugs me a bit, but I'll cure that when I get some "free time" at work, ...haha, yea good luck with that:)
I know, pictures, pictures pictures....mine looks just like the one on the Bestairgun website, only no pretty lady...I'd hold it, but I doubt anyone would appreciate THAT picture:)
