Crimped Primers

[Mousegun]

I have read a lot about removing the crimp in 556 brass before priming.

Can someone explain a bit about the actual crimp itself? Is it the full length of the primer? Is it just at the top portion like the crimp on a bullet?

I know there are tools that remove the crimp but can a drill bit be used successfully?

Thanks for any response.

 

[doorman]

The crimp is at the top portion of the primer pocket. I use a debur tool to remove the crimp. It makes a small beveled chamfer and the primer goes right in.

 

[FredT]

doorman is correct. I bought the dillon primer swaging tool years ago to use on .556, .762 and 9MM primer pockets. It pushes/swages the metal back into place and does not remove the metal. It is good for large amounts of casings. I you have only a hundred or so, it is not worth the purchase.

 

[rcmodel]

See this for photos of a commercial case without a crimp, a GI ring crimp, and a foreign stab crimp.
http://www.google.com/imgres?imgurl...w&sa=X&oi=image_result&resnum=1&ct=image&cd=1

All that needs to be removed is the ring or stab marks.

rc