[Steven Newcomer]

I have shot a bunch of 69’s with AR Comp and the shoot well. My only thought is load 4 rounds up at 22.6, 22.9, 23.2, 23.5, 23.8 (after 23.5 monitor your primers for pressure). That way you are not wasting 20 rounds if your rifle does not like 23.2 or 23.5? 4 round groups will not tell you if a group is AWESOME, but it will 100% tell you if a group is BAD. A 2”-3” group at 100 yards is NOT going to get any better so no need to waste ammo. Then when you fin a 4 shot group that looks great, load up 5-7 to confirm.

[Steven Newcomer]

Also, one major thing I would add for shooting the 90’s from RMR is some lots are pretty consistent, but if you mix a few lots of say 500 there can be almost .5 grains +/- on a few bullets. If you are just plinking at 1000 it is what it is, BUT if you are shooting a competition where you NEED to eliminate as many variables as possible I would 100% weigh your bullets with a super accurate scale (I use the A&D120 that measures down to the .02 (2/100ths) of a grain. I keep my batches in roughly .06 +/-. Last thing you want at 1000 is one round weighing 89.70 and the next at 90.26 grains!!! That will translate to about a 3-5ish MOA elevation change on target.

[Steven Newcomer]

My N140 load is 24.1-24.2 grains with the 90’s and they shoot amazing at 1000. Varget is was my go to, but with N140 I just bumped it up .1-.2 grains with no issues with pressure.

[Steven Newcomer]

Elevations are
29 Palms Marine Base, California = 2100 feet above see level
Ben Avery shooting facility, Phoenix Arizona 1800 feet
Boulder Rifle and pistol club, Boulder City NV = 2500 feet
My elevation from a 200 yard zero is roughly 29-30 MOA

[Steven Newcomer]

They will carry enough speed to set off electronic ShotMarkers if you are getting 2675fps out of the muzzle. My 20″ White Oak 1/7 twist with 24 grains of Varget are getting 2700fps muzzle and are good to go.

[Steven Newcomer]

I will say out of a 20” White Oak Service Rifle upper with 1/7 twist Krieger barrel I am getting 3/4-1/2 MOA with
23.8-24 grains of IMR4064
23.5-23.7 grains of IMR8208
24.4 Vihtavuori N140
24.4-24.6 Varget

[Steven Newcomer]

I shoot ACROSS THE COURSE NRA HP/CMP, I have found sub-moa groups consistently with your 69’s with 23.5 IMR8208, 24 grains of Vihtavuori N140. Wolf and Lapua brass and CCI450’s at 2.255 mag length for 200 yard and 300 yard stages. I imagine 23.5-24 of Reloader15 would be great and 22.8-23.2 of H4895 would be a solid grouping also.

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