Just wondered if anyone has tried Winchesters Large Rifle Magnum primers? I have read that they are suppose to be hotter that Federal 215's and should give a little more increase in velocity than the 215's...

ThankYou!!!!!

I used these primers for my hot loads in .444 Marlin and .458 Win Mag. Great powder burning, nothing else to add. Hopr that can help you. IMHO.

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BER007
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The WLRM does appear to be a hotter primer than Federal's 215, but you are not likely to obtain significantly higher velocity.

An example of this is with a 180 gr. Hornady SP in W-W '06 cases with 62 grs. H4831SC. The standard WLR primer produced 2660 fps @ 54,600 psi. The Federal 210 produced 2669 fps @ 54,500 psi. The WLRM primer produced 2705 fps @ 57,700 psi. The Federal 215 produced 2676 fps @ 54,900 psi.

In other words, an increase of some 2,700 psi (5%) results in an increase of less than 30 fps (1%).

Thanks for the responses......

Merry Christmas!

I luv WLRMs. Have used them in all my large magnum cases (except the .300 WSM... regular WLR). Reliable.

I've used them in my big Weatherbys, .338-378 and .460 with very good results. I have also used them in .375 H&H and .416 Rigby as well. They are every bit as good as Federal 215's. Bill T.