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Ammo and Reloading Factory Ammunition, Reloading, Components, Load Data and more.

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  #1  
Old 11-05-2016, 9:36 PM
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Default Did I just buy 3000 primers I won't use

My mistake, saw the CCI 200's on sale grabbed 3 boxes from the bottom shelf, got home a noticed they are CCI 250's.

I do reload 7 mag but it is my hunting rifle and will never see 3k rounds through it.

I do reload .243, x39, 54R....can I use it on these?
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Last edited by kevins750; 11-05-2016 at 9:45 PM..
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Old 11-05-2016, 9:46 PM
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You should be able to use the magnum primers for the other rounds you listed. You'll probably want to back off on the charge weight a little bit just to be save.
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Old 11-05-2016, 9:52 PM
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Quote:
Originally Posted by Enfield47 View Post
You should be able to use the magnum primers for the other rounds you listed. You'll probably want to back off on the charge weight a little bit just to be save.
Back of the minimum charge?
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Old 11-05-2016, 10:07 PM
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Old 11-05-2016, 10:09 PM
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Magnum primers give you a hotter and longer burn, so you should start at the minimum charge (or thereabouts) rather than jumping right to max charge and going down from there. Pretty much like you would normally load - low to high.
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Old 11-05-2016, 10:13 PM
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All good advice above. I'm a little less cautious about using mag primers in lieu of standard primers. But, then again, I don't load to absolute max. A little wiggle room is sometimes a good thing. I've yet to find the most accurate load being right at max. limit.
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Old 11-05-2016, 10:16 PM
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Ok, cool on the x39 and 54 they can stay at min charge, not loading for accuracy on those really.

Little bit of googling and I found quite a few forums with the "243 with mag primers" threads.
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Old 11-05-2016, 10:31 PM
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All I use is the mag primers and have never needed to back off my loads....especially to min start loads. Most of my loads are max loads for hunting also.
You may just find the mag primers give a more accurate load----especially with ball type powders and they often call for mag primers to start with.

I would say just use them...........or send them to me to dispose of
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Old 11-05-2016, 11:35 PM
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The one thing I've heard and believe I experienced when using magnum primers in standard loads is . The power of the primer it self can start the bullet moving forward before the powder really gets going . There are a couple different things that "may" happen "if" this happens .

1) you get inconsistent velocities and ES/SD

2) If you have the bullet just off the lands . That bullets movement can push it into the lands before the powder starts peaking making that load work more like a jam rather then just off the lands .

I did a duplicate load work up in 223 using CCI#400 & 450 . I had higher velocities with better ES/SD using the standard #400 then I did the magnums . Which surprised me because it just seemed logical the magnums would create higher pressures therefore have higher velocities .
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Old 11-06-2016, 7:42 AM
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In my early days of reloading I seem to recall reading something from CCI where they recommend "ball" or "stick" powders be used with magnum primers because of the different burn rates as opposed to flake powders. Personally, I'd trade them to someone who needs them - not worth the risk.

EDIT: Just checked the CCI site:
  • 23 percent hotter flame than standard primers
  • Increased flame duration
  • Initiator compound engineered to ignite ball/spherical propellants
  • Usage Note: Use Magnum primers only where called for in published reloading data

Last edited by Barbarosa; 11-06-2016 at 7:47 AM..
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  #11  
Old 11-06-2016, 7:44 AM
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Use em or sell em at a profit later.
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Old 11-06-2016, 7:51 AM
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During the great primer famine of 2008-2010 , magnum primers were all I could find for my Garand and M1A. I use middle loads and they worked perfectly fine.
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Old 11-11-2016, 6:04 PM
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No need to go below minimum load.
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Old 11-11-2016, 9:30 PM
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The big difference is that the cup of the primer is a little thicker to withstand the higher magnum pressure. Them being hotter is a zero problem. I've used them for years on 90-95% loads without any bad effects.
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