Mulegunner,
Two points; The .45 Colt was never made for a rifle. It has a small rim /flange which gives little to grasp by an extracter (revolvers push out the cases).
It is also a straight case, which is not good in a rifle that has no mechanical advantage to extraction, like a bolt action has.
Add to this, a hot load and maybe a rough chamber and ta-da!
On the positive, if it works, no problem. :wink: