12-12-2023, 02:05 AM
(12-10-2023, 03:07 PM)Diesel Pro Wrote:(12-07-2023, 04:07 AM)UncleBob Wrote: One of the best loads I've worked up for the ARC
87gr VMAX
VIHT N135 27.3gr
2933fps on my 20" 1:7.5
Work up to this one, the load is slightly compressed and you may get overpressure.
Hope this helps. Shoot happy.
Curious did you run a full ladder on this setup? I have a mostly full jugs of N135 as well as 133 and 140.
I set up to run a ladder from 25.4 to 27.2 but the first couple would not cycle proper. Thinking I probably should change to .1 increments. I also had issues with my Labradar not reading. If memory serves POI was good, but the snow was coming in and the light was fading fast so I packed up.
Right now I'm limited in optics to a thermal and ammo so I am just sticking to 50yds and a small square on a paper plate, but with the Hornady Black 105's I have decent groups often with holes touching during my zeroing operations. I have a couple of scopes that I hope try soon, but if I was to do a night shoot I'm pretty confident in 50-300yds with the Hornady Black.
I did run a ladder. I went in .2 increments. I run my potential loads on Quickload before I start. The 27.3 gave me the best groups. 27.5 I had an ejector mark on the case. I had already done some work to the barrel. I knock down and polish the big hump in the middle of the feedramps, and open up the gas port to .110" and go with an SA adjustable gas block. Couple of tricks we learned from building Grendels. Hope this helps.
I am your uncle!