Pure lead and even 20-1 alloyed bullets did not stand up to that acceleration. By weight a start load of 45 gr would be about right.Īlso note I use a 16-1 alloy which holds up a lot better to the magnum level velocity generated with the 90 gr (V) load of Triple 7 fffg. Not saying megasupermagnum doesn't just pointing out that a "starting load" of 90 gr of Triple 7 under that Maxi might be a bit much. My bad as I just figured experienced ML'ers would understand that. The weight of 90gr (V) of Triple 7 fffg is just 68 gr. That is by volume of BP using a BP measure which is what the (V) stands for. With a scoped 50 caliber rifle, I'm pretty consistent at 1 1/2".Note in my post above megasupermagnum's I stated I use " 90 gr (V) Triple 7 fffg". With open sights, I saw the occasional 3" group at 100 yards, 4" was more realistic.
It's ok to start at 90 grains, but best accuracy for me in both 50 and 54 caliber is 110-120 grains. I never could get these to shoot good with even moderate charges of powder.
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