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Primers, much Difference?

 
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  #1  
Old 07-27-2013, 01:39 PM
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Join Date: Feb 2012
Location: Mecosta, Michigan
Posts: 83
Primers, much Difference?

Hello, I'm loading some Coyote rounds for my 25-06
Hodgson H4831SC Powder
Sierra 75gr.HP

Looking to hear about Primers.


CTW
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  #2  
Old 07-27-2013, 05:33 PM
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Join Date: Apr 2011
Location: Wisconsin
Posts: 40
Re: Primers, much Difference?

you can play with different ones and see if one is better for accuracy but best advise is to stick with the same one once you get 1.

don't mix and match.

I use Winchester primers.
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  #3  
Old 07-27-2013, 08:18 PM
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Join Date: Jun 2007
Location: Fredericksburg VA
Posts: 4,118
Re: Primers, much Difference?

Primers are just like any other component. They can make a huge difference.

A little research will show certain primers "tend" to do well with certain cartridges and powder combinations, but not always.

Some are much hotter, softer, harder etc than others and can increase pressure by up to 7000 PSI as actually measured with strain guages.

So when changing primers, drop back down and work up.

BTW, that is how you end up with bricks of 1000 primers on your shelf from every mftr.

Good luck
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  #4  
Old 07-27-2013, 08:26 PM
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Location: S.E. Michigan
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Re: Primers, much Difference?

...and they vary in cup height as well. Nominal diameter is pretty constant across brands in intended use but height varies a bit. Good rule of thumb is use the recommended (in this case by Sierra) for their projectiles. They have well paid ballisticians on staff that do nothing but build and analyize different loads.

I really didn't realize the difference in cup height until I started modifying black powder rifles. Especially 209 primers are all over the place cup height wise between manufacturers and even between lots.

I stay away from the off brands of primers (I realize that primers are hard to come by right) now so you need to use some preplanning and order what you require and wait patiently.
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  #5  
Old 07-28-2013, 07:33 AM
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Join Date: Feb 2012
Location: Mecosta, Michigan
Posts: 83
Re: Primers, much Difference?

Thanks everyone, always good to hear from the group, @ sidecarflip, that's a pertinent piece of information that of the bullet manufactures recommendation.
I'll be sure to take notice of that,


CTW
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  #6  
Old 07-28-2013, 05:40 PM
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Location: Cincinnati, Ohio
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Re: Primers, much Difference?

I use mainly CCI primers and fall back on WW primers if need be
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  #7  
Old 07-28-2013, 06:21 PM
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Join Date: Mar 2012
Location: New germany, NS
Posts: 290
Re: Primers, much Difference?

I also use use cci with winchester as a back up. When I use imr 7828, h1000, rl22 I use mag primers. For imr 3031 imr 4064 and imr 4227 std primers. I also buy my primers by the 1000
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