Matt I know this may be a dumb question but do you have a shock buffer installed. I was having a similar problem with my Cameron's super comp, removed the shock buffer and haven't had the problem since.
The area championships that I have shot go by order of finish, random draw and no prize table at all. I most enjoy those with the random draw since I won a gun at the last match I shot.
Glock open guns have little room for error, I speak from experience. Brass not fresh or once fired can easily result in a split case given the pressures your shooting. Split case = ka boom and 2k down the drain.
Someone correct me if I'm wrong but I think "most" all 9 major loads are compressed. I preferred 7625 a little softer. Word of advice use only fresh or once fired brass, this is a recommendation from KKM.
I have a few thousand Berrys plated bullets sitting around collecting dust and was wondering if anyone has shot these in an open gun. I am currently shooting at approx. 1400 fps with my current loads, any opinions would be appreciated.