That looks like a quickload print out not actual velocities.
Varget, RE15, 748, 2520 are in the right range for burn rate using 75s and 80s IMO.
This was from 2008- You can see I am at least 1 gr more in a case that holds 1/2gr less and still shooting groups under 1/4".
The first barrels gas port was a little large, now I know to start at .089" for a RGS 20"
5.56x42 20"- freebore may need to be shorter for Bergers
27.1gr IMR4895 75gr amax 2.35 3130 0.75
28.1gr MC IMR4895 75gr amax 2.275 3030-3060 28gr MAX---28.5 showed swipes,
AMAX seat to 2.309 try 27.3 27gr H4895 75gr amax 2.275 2990
*** 28gr MC H4895 75gr amax 2.275 3110 28gr MAX again
27gr varget 75gr amax 2.275 2870 only decent groups came at 2.29----3085fps 26"
28gr MC VARGET 75gr amax 2.282 2920 1/4"
[email protected]_with Krieger
28.6gr varget 75gr amax 2.348 3096 max compression -good but verticle string lt swipes
26gr 3031 75 2.303 3065 Nice 7 in .5, 4 in .5, again nice group
26.5 3031 3030
RE17 too slow 27gr RE15 2.29 2800 .3" group------3123fps 26"
27.8MC RE15 2.31 3050
28.6gr RE15 NO 2long 2.348 3095 max - group bad lt swipes
27 4064 3134 26"
27.5 4064 2975 8-26 1/2"moa
>try 27.6>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 27.8MC 4064 3060 3 in .3
28.2gr IMR4064 NO try 28 2.348 3090 no swipe, max compression 1/2" groups
27.4gr H4350 2490 TOO SLOW---1/2"group
28MC RE17 75gr 2.31 2962 3 in .2
27.3 335 2950
28 335 3050 MAX load, bad group
25 322 75amax 2.304 2930 5 shots 3/8" slow but damn accurate
25.5 322 2945
24.5 10x 2.31 2975 4 shots in .151"!!!!!!!!
25 10x 75AMAX 3025 5 in 5/8 in 10mph wind,
25.5 10x 3040 some pressure signs
Berger touch at 2.310-314 75 BERGER
28.2 322 55NBT 2.205 3545 1/2"great load
30.3 i4895 55nbt 2.18 3450
55NBT touch at 2.215" 28.5gr h4895 55nbt 2.184 3255 decent group
xxxxxx 28.5gr h4895 55nbt 2.05 3255 Nice group at this length 5/8
29.2 h4895 55nbt 2.18 3420
28.6 Varget 55nbt nbt 2.22 3200
29gr h4895 69smk 3190 warm
28.6 Varget 69 SMK 3100
I can load and test velocity here in the shop. I'll shoot some 75s and 55s with CFE, Lever and 8208 in a few minutes.
