I have also a gew1911.
It shoots really well with boolits I make with a Accurate mould (catalog-item 31-200V)
at the moment I'm in the process of developing a load, and at the moment its quite easy to shoot 50mm groups at 100meter (i have a scope on the rifle).
But I think it can do even better!
@ M1fuzz: good luck with your K11!