I have a Colt Gold Cup Series 70 that has been in storgae for some years while I was outside the Country. I replaced the original factory spring some years ago, but don't recall what pound # spring is in it now. I want to shoot a mix of both normal and +P ammo, but mostly hardball with only the occassional +P load. It may also be a carry weapon for CCW use, as well. Opinions on spring size please?