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Old March 23, 2012, 11:55 AM   #2
WIL TERRY
Senior Member
 
Join Date: July 6, 2000
Location: BLACK HILLS
Posts: 1,120
THE SPEER NUMBER FOURTEEN LOADING MANUAL has five pages of 257ROBERTS+P loading data including fourteen propellents pushing 100GR .257" projectiles.
It is T-TOTALLY up to YOU to develope any loads beyond that and yours noted so far are in dream land as far as labortory developed loading data is concerned.
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