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Old February 16, 2010, 21:25   #7
SteveW
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FALaholic #: 9378
Join Date: Feb 2003
Location: Austin Texas
Posts: 1,177
Looks like I was mistaken. Lyman #49 shows 44.3 grains of RL15 delivering 2697 fps out of a 24" barrel (1:10) as a max load for the 175 SMK. So, you still have a little to go, but I don't know how long the barrel of your AR10 is. I would imagine that the 2700 fps number comes from a Rem 700 bolt action with a 24" barrel..
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