Winchester small rifle primers

DEEREHART

November 24, 2023 03:54

In the interest of being consistent, in my reloading I have always used Winchester small rifle primers (WSR)

I load 17 Fireball, 17 MK IV, AND 204 RUGER.

I load 2-3 thousand rounds a year for these three cartridges.

I am coming to the end of my WSR stockpile, and not finding the availability that i would like.

The availability seems to be good for Winchester WMSRL #41 primers. These are NATO spec for 223/556.

What differences (if any) would you expect to see if switching? i am good for one more year but i really dont want to start over and work up new loads for these three loads?

Thoughts......

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  elubsme

  November 24, 2023 08:15

  NATO spec are harder and are made specifically (recommended) for the military round but can be used in the civvie .223. EZ, log live the 45-90.

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  NeoBlackdog

  November 24, 2023 12:28

  IIRC the difference is a slightly harder cup in the military versions (41's). The loads should work up the same.

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  Mobuck

  November 24, 2023 12:43

  I don't know about Winchester #41 but CCI #41 reportedly is a 'magnum brisance" primer.

  I found the #41 primers required a 0.5 grain drop in powder charge to obtain similar velocities in .223 ammo.

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  Oakie

  November 25, 2023 15:55

  I just bought some at a show, as I was almost out too. I won't say what I payed, but it was ridiculous.

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