When in essense all you have got is really an improperly supported primer with pressure against it on a person facet and no metal supporting it within the back side.I am positive you may make use of them, probably with none difficulties, but in the three hundred wm, I'd personally check out to seek out some Federal GM215M primers, or large rifle ma

When in essense all you've got is surely an improperly supported primer with force from it on a single aspect and no steel supporting it around the back again aspect.Just Various other things to think about rather than only switching primers right up until the cratering goes away.308stillbrass said: Keep in mind that primer cup hardness is not the

Such as 300 WM. Are they used on a regular basis for large cases? I know they're designed for large rifle common scenarios. CCI would not make bench relaxation high-quality primers for large capacity magnum cartridges?IMHO I believe you can possibly see 35 fps variation when you ran the exact same load once more with standard primers. For anyone wh

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Just A few other points to contemplate as an alternative to simply just switching primers till the cratering goes absent.We tested loads at both optimum usual pressures and in the commencing hundreds (some labs estimate start off hundreds — we shot them). Typical primers prompted no ignition troubles on the max load but posted larger Serious vers