What are your favorite Service rifle loads?

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Fatelvis

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On the shooting line, during matches, I hear all kinds of favorite loads. What caliber/load is your favorite, and what kind of rifle with modifications do you prefer?
 
For the M1, I like 45 grains of IMR4895 behind a 150 grain bullet. The M1 is sensitive to muzzle pressure, and a fairly fast powder is best. This load is actually the recommended starting load in many manuals, but it functions my M1 beautifully and shoots 1 1/2" to 2" groups.
 
I'm one of the last guys around shooting the M1A (Supermatch, heavy 1:12" Kreiger)

For 200yds and less I use:
125gr Speer TNT, 41.0gr IMR4895, WLR, LC90, 2.75"--2430fps at 80F

For 300-600yds:
155grAMax, 42.0gr SurplusIMR4895, WLR, LC90, 2.84"--2926fps at 112F (really hot load, really hot batch of powder--2750fps would do just fine).

Everyone else (who shoots an AR15-A2 config with float tube, match sights, 1:7-1:8" twist, match trigger). 24grs Varget with the 80grSMK is popular at 600yds.
 
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