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Old December 26, 2012, 09:29 PM   #12
Senior Member
Join Date: December 10, 2012
Posts: 3,139
The main thing is how much bearing surface the bullet has and how much case capacity it occupies. For example, If I had data for 140grain spitzer, I would have no problem using that data for a 140 gr spritzer boat tail. If I were using boat tail data for a spitzer, I would work up from starting load.
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