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CCI vs Remington primers for 300 win mag

 
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  #1  
Old 05-30-2013, 09:36 PM
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Join Date: May 2013
Posts: 142
CCI vs Remington primers for 300 win mag

I'm new to a 300 win mag and also to reloading. I'm trying to reload for as much accuracy as I can get. I have CCI large rifle magnum primers and Remington large rifle magnum primers. Which one is going to be best for accuracy??? I've heard that Federal Gold Match primers are the cats meow, but of course I can't get any.

I'm having a Winchester model 70 rebarelled with a match grade barrel and bedded trying to get as much accuracy as possible. I'm using Norma brass and sorting the brass by weight, deburring the flash hole, uniforming the primer pocket, cleaning the brass with a sonic cleaner, sorting the bullets by bearing surface and measuring each powder charge to within .1 grain. I won't know how close to the riflings I can get with the bullets until I get the rifle back.

Any advice would be appreciated.
Thanks.
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  #2  
Old 05-31-2013, 12:15 AM
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Join Date: Apr 2009
Posts: 887
Re: CCI vs Remington primers for 300 win mag

Quote:
Originally Posted by dmax1800 View Post
I'm new to a 300 win mag and also to reloading. I'm trying to reload for as much accuracy as I can get. I have CCI large rifle magnum primers and Remington large rifle magnum primers. Which one is going to be best for accuracy??? I've heard that Federal Gold Match primers are the cats meow, but of course I can't get any.

I'm having a Winchester model 70 rebarelled with a match grade barrel and bedded trying to get as much accuracy as possible. I'm using Norma brass and sorting the brass by weight, deburring the flash hole, uniforming the primer pocket, cleaning the brass with a sonic cleaner, sorting the bullets by bearing surface and measuring each powder charge to within .1 grain. I won't know how close to the riflings I can get with the bullets until I get the rifle back.

Any advice would be appreciated.
Thanks.
Try them both and run the one that produces the best results. There is no one solid answer for every rifle. It's a matter of trial and error for all of us.
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  #3  
Old 05-31-2013, 11:44 AM
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Join Date: Jan 2013
Location: Northern Idaho
Posts: 236
Re: CCI vs Remington primers for 300 win mag

Each type of primer uses a different mix when they produce their primers and has a much different burn column and degree of how hot it is. Sometimes a change in primer can dial-in a load when you're really close. Testing the load for accuracy using different primers is usually the last thing I change after every thing else.
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Cole

"Only accurate rifle are interesting" Col. Townsend Whelen
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  #4  
Old 05-31-2013, 12:11 PM
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Join Date: Nov 2010
Location: deer park, wa 99006
Posts: 123
Re: CCI vs Remington primers for 300 win mag

Quote:
Originally Posted by brentc View Post
Try them both and run the one that produces the best results. There is no one solid answer for every rifle. It's a matter of trial and error for all of us.
+1. Only your gun can answer that question.
I've had the best results with cci in my 300wm. But yours maybe different.
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  #5  
Old 05-31-2013, 05:01 PM
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Join Date: Jan 2011
Posts: 2,099
Re: CCI vs Remington primers for 300 win mag

There are only 2 things I can tell you, first off the CCIs tend to have a harder cup (usually!), second the CCI250 is as close as you are going to get to Fed215s, rem9 1/2Ms are closer to standard winchester Large Rifle, and WLRMs aren't much warmer than the standard LR. You will likely find the remingtons to work better with the faster powders and the CCIs with the slower ones, but as already stated its a matter of trial an error.
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  #6  
Old 06-13-2013, 02:45 PM
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Join Date: Jun 2013
Location: Reno,Nevada
Posts: 2
Re: CCI vs Remington primers for 300 win mag

I tend to agree with Backwoods, as I find RP 9 1/2s and 9 1/2Ms tend to be a little "softer" shooting. There are a lot of times when changing to the RPs that my velocities drop a bit...In other words, I MAY put 1.0-1.5 grains more powder in a .300Mag to bring the velocity up to where it was with Federal 215s...not quite so much with CCI 200s.
Have fun,
Gene
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  #7  
Old 06-13-2013, 04:07 PM
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Join Date: Nov 2010
Location: deer park, wa 99006
Posts: 123
Re: CCI vs Remington primers for 300 win mag

My 300wm loves cci250.
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