I think we started out with 8.2gr of 2400 in the 300 and that put us right around 1000fps in the 16" bbl. I don't think detonation is a problem when the case is nearly full and that load of 2400 is not quite case filling but isn't on the low side either. Just keep an eye on the powder volume and remember that the 240gr bullet will fill quite a lot of that case.
Frank
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