View Single Post
Old December 1, 2009, 02:37 PM   #5
Unclenick
Staff
 
Join Date: March 4, 2005
Location: Ohio
Posts: 16,606
Mike,

The fired case numbers could be big if the neck on the brass is thinner than normal? Measure the OD of a neck with a bullet seated in it. A lot of commercial chambers run 2-4 thousandths bigger.

You might try semi-neck sizing. Use your regular FL sizing die, but only run the case in far enough that the sizing die is touches down on the sides. You should wind up with a neck resized most of the way, but not all the way to the shoulder. The short unsized portion helps center the bullet in the bore.

Also, you didn't mention if you'd measured loaded cartridge runout? That can make quite a difference to the accuracy of shorter bullets.
__________________
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Benefactor Member and Golden Eagle
Unclenick is offline  
 
Page generated in 0.03947 seconds with 8 queries