primers

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For general use not enough to worry about. Benchrest are made by someone with more experience in putting the primer compound in the cup and is usually more consistent. Some can tell a difference, most cannot in general use. To get the most out of benchrest primers you would need a very accurate rifle and an experienced shooter with very disciplined reloading methods.

And the replies above.
 
It sounds crazy, but the fellers above are correct (well most of them). Accuracy is based on consistency. The priming compound is applied to the cups by hand, and an experienced "compound packer" is more consistent. Less variation from primer to primer...
 
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mdi said:
It sounds crazy, but the fellers above are correct (well most of them). Accuracy is based on consistency The priming compound is applied to the cups by hand, and an experienced "compound packer" is more consistent. Less variation from primer to primer...
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so they use the better primer packers and call it bench rest!?!?! very cool! Now were can I buy some for $50 a brick
 
What ever the difference is in the two is I really don't know. I can tell you that after many years and thousands of rounds loaded for my bolt guns for accuracy their is a difference. I get more consistent and tighter groups with my loads using 210Ms in my rifle rounds.
 
In my experience…yes. Remington 7 1/2 BR delivers lower SD’s compared to the 6 1/2 with everything else being equal.
I realize you asked about CCI but they don’t make bench rest or match small rifle primers.
 
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Nature Boy said:
The difference, with one rifle and a developed load

View attachment 1061368
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Holes in paper speak volumes. :)

When you say "developed load" did you develop for each primer or just replace the primer in a known-good load? I guess what I'm asking is, did you take any extra steps to try and wring out the best possible performance from each primer brand/style? Or, did you take a load that was optimized for one brand/style and replace the primers with every other brand/style just to see how they'd do, all else being equal?
 
Not speaking for NB …I can do it either way however with any component change the node can move slightly so testing on each side can show improvement or decline.
Jim
Added: some guys have come to the conclusion that the receiver has a preference to primers rather than the barrel, meaning that once you’ve determined the ideal primer it will follow the receiver although we still test. Good topic for discussion.
 
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GeoDudeFlorida said:
Holes in paper speak volumes. :)

When you say "developed load" did you develop for each primer or just replace the primer in a known-good load? I guess what I'm asking is, did you take any extra steps to try and wring out the best possible performance from each primer brand/style? Or, did you take a load that was optimized for one brand/style and replace the primers with every other brand/style just to see how they'd do, all else being equal?
Click to expand...

Developed load meaning optimal charge weight determined, seating depth determined, with the last step being to choose the best primer.
 
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