I'm running them in my M14. I cleaned a 600 yard target last week and shot 1.2 MOA at 600 yards for 11 shots. 100-6X, 110-7X if you count the sighter. I shot six X's in a row before the wind blew me out of the X-ring and into the 10-ring. I managed to hold left and bring it back into the X-ring.
I'm running 42.6 grains of IMR-4064 with Remington 9-1/2 primers and military brass. Muzzle velocity out of a 22" barrel was 2630 FPS. The target indicates a SD of 12. You'll have to play with your seating depth according to your chamber print. I'm running a match chamber and I'm running longer than mag length. It's over 2.850".
Since the vintage sniper match I shoot in is single-feed only, I'm able to get away with running a longer than mag length load.
Here's a 300 yard target with a 15 MPH wind.
300 yard target.
Tony.