I have the same story. My Guardian has 'nose dives'. I am still trying to work it out. Tried different mags, different ammo. Its gotten better, the more i shoot but still have the issue sometimes. Err.
I know this is a 1911 forum but I hope someone can explain to me the definition of '2011'. I believe STI started using that moniker to describe their double-stacks but the term seems to have grown legs to mean ANY 1911 double-stack. True or not?