centershot
20 fps per inch of barrel, regardless of caliber or powder. A 223 or a 300 Ultra mag gains or losses about 20 fps per inch of barrel. If I were good with the search feature, I'd find the test I posted several years back.
Charlie
The data and opinions contained in these posts are the results of experiences with my equipment. NO CONCLUSIONS SHOULD BE DRAWN FROM ANY DATA PRESENTED, DO NOT, UNDER ANY CIRCUMSTANCES, ATTEMPT TO REPLICATE THESE RESULTSj
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