Greetings Zimmer,
I think your info is accurate based on my limited knowledge. The only BM8208 loads I have chronographed to date were with 125 grain TNT projectiles in the .308 Win. These were right on for velocity after adjusting for my shorter barrel. I have some .223 test loads ready and will report once I have fired them. BM8208 is a reasonably fast powder so will build pressure quickly. I am not looking for that last erosive foot per second (to quote Matt Grant) so I shouldn't get into too much trouble.
Regards Grandpamac.
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