Originally Posted by Engineering101
Now you have opened a can of worms mentioning the 45 ACP and 44 Mag. There are two different types of crimps used for pistol ammo. The taper crimp is typically used for automatics like the 45 ACP and the roll crimp (more easily seen) for revolvers like the 44 Mag. I've never seen any factory pistol ammo that wasn't crimped. You can't roll crimp a 45 ACP and the like because they headspace off the mouth of the case. I'm sure wikapedia or some such could give you the full story on this.
Sorry, I never meant to open up acan of worms.
So I guess I got my answer on the crimping of my 7 mm mag, I dont need to crimp them,but what about the 45 acp and the 44 mag in which I will be loading soon also.I have checked my 45s factory bulk supply and the are not crimped, I didnt have a chance to look at the 44 mag factory shells, Why would they have to be crimped? is it because of the recoil?
I do have a question about not crimping the 7 mm rem mag, if not crimped would the bullet leave the cartridge before all the power had time to build up presure in the case, and leave power flash in the barrel , because the bullet left to soon? I hope I am explaining this right.
I want to thank everyone who has responded as I want to do this right and safe, also want accuracy, the main reason I am starting reloading .
Maybe this thread is getting to complicated with all the different loads we are talking about crimping. I mainly want to know about my 7 mm mag as that is going to be my long range rifle and I am looking for 1 ragged hole.
The pistol ammo, maybe should be another thread?