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6.5 Creedmoor short cut

I've started shooting a Springfield M1A1 Precision and am working on the most effective load. To date the following has been the best sub-MOA patterning: Barnes cases, 140 gr. Hornady SST, CCI #34 primers, and 44.1 gr of IMR 4350. I tried Hornady 143 gr. ELDs with various powders, including Superformance, but can get the patterns as tight as the SSTs. Anyone out there with load data they can share? The cost and availability of reloading components is getting cost prohibitive to do extensive load comparisons. Your assistance is greatly appreciated.
 
I don't have an m1a, but do have several 6.5creeds. Hard to say what would be the most effective (if you mean accurate) for the m1a?
 
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