10Glocks said somethings about where to mount a crescent butt plate on your shoulder! Do not mount on the shoulder!

Without further explanation, I will try to clarify that.
You do NOT mount the crescent on your shoulder. You can mount it one of two ways.
1. Upper part on biceps and lower tip in arm pit.
2. Lower tip in arm pit and upper tip in cup between shoulder arm joint and chest.

It took only one 45-90 shot to tell me that it was wrong (and possibly painful) to mount the butt plate on the shoulder.

Since learning to mount it correctly, no pain!

CRS, NRA Benefactor Life Member, Whittington Center, TSRA, DWWC, DRSS
Android Reloading Ballistics App at http://www.xplat.net/