Buy a 10mm, shoot a ton of .40 through it for practice, shoot and carry 10mm also. I've put several hundred .40 through my Glock model 40. It doesnt cycle 100%, but shoots just fine for range work.
Or buy a 45, shoot a ton of 45 Auto through it, and use the 45 Super ammo for heavier duty work.
Plus, the whole 40 through a 10mm doesn't work so well on 1911s.
