I've been loading 45-70 for a Magnum Research BFR for quite a while, and lately I've been using the Berrys plated bullets. I tried LMP primers and they work fine in the revolver, but I never tried them in my Marlin. The primer cup may be thinner, which may cause the rifle firing pin to pierce the primer - maybe? I've been using H4198, I think about 50-51 gr
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