Before I go all ape shit trying to pin down some br primers for use in my 30PPC Largo I'd like to get your opinion as to if you believe there is any accuracy diffrence to be found betwixt the CCI BR-4 and STD 400 primersCCI BR primers vs STDYes using BR primers shrink groupsCan you say placebo

I have absolutely nothing upon which to base this vote. But it's gratifying to skew the data 100% in one direction.

Varmint Al goes into great detail explaining primer pocket preparation --

http://www.varmintal.com/arelo.htm

Varmint Al is a retired Structural Engineer from Lawrence/Livermore labs -- "The Atom Bomb People." Al's page is directed toward varmint shooting -- which is a variant of "benchrest."

Al also warns about vibratory media cleaning of cases and how the necks bumping together "work harden" them.

Al runs a bunch of other speculations on his site which could only come out of the head of a structural engineer. It's interesting to speculate what affects group size -- besides the trigger nut.

I think maybe he's over the top.

Here's another link which will have you spending more $$$ on smaller groups --

http://www.hevanet.com/temple/MatchPrep.html

Most competitive 30BR shooters use Federal 205M or plain Fed. 205. Winchester will come in next. I don't know of anybody that uses CCI primers.
Butch

i can get cci400 local. so i have been shooting at home with cci but shoot win. away from home. so far i cant tell the differance in a 6 ppc not a 30. i will get brave some day and try them for real.

Hello Ray.
Guys, Ray is a very good benchrest shooter. He has a dog that may be as smart as he is though.
Welcome to the forum.
Butch

thanks butch,that is high praise indeed from someone i respect. but you do the poor dog a disservice, he has sense enough to get out of the rain and i dont.