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rg1 · January 16, 2012, 12:09 PM

I shoot Hornady bullets in my Sendero from 87 SP's to 117 gr BTSP's. I use IMR 4831 with RP 9 1/2 primers. One thing to add is I experimented with overall lengths first finding out what the measurement was with the bullet seated to just touch the rifling. My rifle has a preference for my bullets to be seated .030" off the rifling. It tightened up my groups. I started with my best group seated to Hornady's recommended oal and then seated them from .010" to .050" off the rifling and groups tightened at .030". Just another thing to try.

January 16, 2012, 12:09 PM	#6
rg1 Senior Member Join Date: November 6, 2001 Posts: 1,125	I shoot Hornady bullets in my Sendero from 87 SP's to 117 gr BTSP's. I use IMR 4831 with RP 9 1/2 primers. One thing to add is I experimented with overall lengths first finding out what the measurement was with the bullet seated to just touch the rifling. My rifle has a preference for my bullets to be seated .030" off the rifling. It tightened up my groups. I started with my best group seated to Hornady's recommended oal and then seated them from .010" to .050" off the rifling and groups tightened at .030". Just another thing to try.