I have no small "magnum" pistol primers, but i have lots of "standard" small rifle primers. So i have been using the standard small rifle primers in my 357 Magnum. The Vihtavouri Cowboy load data sheet states that Small Rifle primers were used during load development of the 357 magnum. What is the difference between these two primers?
http://www.lapua.com/en/products/rel.../relodata/7/96
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