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Winchester small rifle primers


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?



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