Chamfer/deburr after trimming for bulleye.

[jlow]

For those reloading for bulleye shooting, I understand the need for trimming to obtain a consistent crimp.  My question is should the case be chamfered and deburred after trimming?  In rifle, this is a must, but at least considering that with a 9mm, the bullet will be held by a taper crimp, chamfering could affect the crimp in a inconsistent manner?

[Dwbsig]

I would remove the burrs and sharp edges.

[jlow]

Well that is of course the NORMAL reason to do chamfer and deburr, but in this specific case since I am doing a taper crimp, those operations will thin the lip of the case affecting the degree of crimp.

[AHI]

High master class bullseye never trimed a case . you know they get shorter as they are shot?

second threw tenth time shot they are thear most accurate. after that shot till lost at 25y.

[jlow]

Trimming based on advice from here under "Importance of uniform COAL" which makes good sense to me.

http://bulletin.accurateshooter.com/2015/06/precision-handloading-for-pistols-tips-from-the-usamu/

[AHI]

The AMU and USMC pistol teams do not trim cases.

Go hear http://www.bullseyeforum.net/f13-ammunition-discussion

ask your question .See what they say.

[jlow]

Thanks a bunch!  Will do.

[IDescribe]

No case trimming for 9mm or .45.

 

Sort cases by length, yes. 

 

Trim cases to the same length, no.