Originally Posted by
mgrs
Here are a couple that I use; I'm chasing velocity a little bit as I like to shoot steel with it at 600-800 yards:
All shot in an 18" suppressed Douglas Barrel
77gr Nosler CC @ 2.25 in WIN NT Brass
Tula KVB556M Primer
23.4gr IMR 8208XBR
2680 FPS AV
13 SD
77gr Nosler @ 2.25, WIN NT Brass
Tula KVB556M Primer
24.3gr TAC
2767 FPS AV
9 SD
Accuracy is about the same. Like the TAC load better for the speed and that it is forgiving pressure-wise. I've never done this with 8208, but that same TAC load with a hot chamber and ammunition that had been sitting in direct sun in a clear box for hours on a summer day, got 2790 AV. The rounds were hot to the touch even before going in the rifle. Ejector swipes but no flattened, pierced, or blown primers.
Also have some 2000mr load data but would have to dig it up. IIRC it took heavy, compressed charges but got some incredible velocities with no pressure signs.
If loading with TMKs, I back charges off .2gr.
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