I finally purchased my first 1911

[Greywuuf]

you can always cut down some 45 win mag or neck ream some .308 brass and stoke the load up and do like I do ... it just flings the brass over your head out into the parking lot behind you!

and just FYI I "think" the "standard" spring rate on a gvmt model is 18 lbs, unless it is broke in real good I doubt it would even cycle reliable with a 20 lb spring... wolf makes em about any way you could want them, I have a 28lb spring on hand just in case I wanna get froggy with some very interesting handloads ( don't try this at home it can be very painful and expensive... it was a little research project I was running)

seriously ...shoot it some and settle on a type/brand of ammo you like match the spring to that and just enjoy it. a 1911 is a grand old sidearm and quite the fun way to spend an afternoon.