That's interesting...I've not used magnum primers in my .338 Fed, nor have I had any difficulty exceeding factory loads and showing good accuracy with standard primers. In fact, I've loaded a bunch of .338 RCM loads with standard primers, to see if I really need magnums with them.
Maybe I'll stick some magnum primers on .338 Feds and see if it matters... .
Dennis
Dennis:
I believe the magnum primers are used in non magnum cartridges when ball powder is used, for more complete combustion, as ball powder is more densely packed. I'd quote a source, but I can't remember where I read it. I believe it was in relation to W748 powder, but if I am not mistaken, isn't TAC also a ball powder.
Patrick
"If there are no dogs in Heaven, then when I die, I want to go where they went." Will Rogers
And on the 8th day, God created the Border Collie.
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