checking the neck of brass for alingment

[ig25]

how many of you mic the necks and through the ones out that are 3 or 4 thousandth off.

 

[sakoluvr]

I don't mic the necks, but look for uniformity using a Redding tool. I also check for concentricity with a Redding tool.

 

[Mikecr]

You talking about thickness variance, or runout?

 

[ig25]

Re: checking the neck of brass for alignment

I don't mic the necks, but look for uniformity using a Redding tool. I also check for concentricity with a Redding tool.

thanks for the reply. with out me knowing what and how to ask the question intelligently you answered to what i was wondering

I am having trouble with grouping using bergers or smks. i can get to 1' groups with some and 1 1/2 with others. through some reading discover that some of my brass {remington} may be the issue.

 

[CRNA]

Re: checking the neck of brass for alignment

thanks for the reply. with out me knowing what and how to ask the question intelligently you answered to what i was wondering

I am having trouble with grouping using bergers or smks. i can get to 1' groups with some and 1 1/2 with others. through some reading discover that some of my brass {remington} may be the issue.

Have you played around with the seating depth to see what your rifle likes? I shoot Bergers and SMKs through my 7mmRM and it does make a noticeable difference. Maybe you have already done that, but if not, I would start there. The SMKs were not as sensitive to depth in my experience with my rifle as the Bergers were. The SMKs shot best 0.042 off the lands. The Bergers liked touching the lands. In the case of the Bergers while I was working up the load my groups were massively affected by seating depth.

 

[ig25]

here is some seating depths I have been playing with. and i have got some loaded up with starting .01 in the lands to touching and then .01 off and so on. both with bergers and smk's


heres a link to a post
http://www.longrangehunting.com/forums/f17/maybe-i-put-question-wrong-spot-84368/