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Interesting, have you tried testing with any other bullets?
Really? I thought pressures go up when the bullets were closer?
I don't think guys would come here and make this thread if they had rack grade AR's. I've shot in the .3's with my AR and am just trying to see if it can get better. I've measured my chamber and distance to the lands and believe I can get pretty close. My comparator just came in so I'm going to see exactly how far off the pet loads are. I'm one of those weirdos that likes to shoot my AR @1000 yards and have pretty good success. If I can get another .1moa out of seating depth my average hit ratio will go up.
What I didn't tell anyone is the whole goal for this is 75% or higher hit ratio @1000. I'm at about 40% right now on a 1.5moa plate. Also still haven't got a cold bore hit @1000 yet either
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Moving the bullet out with a given powder charge increases empty case volume which reduces pressure.
Develop a near max load at .030" off the lands, then move the bullet out to the lands with that charge weight you will likely see a pressure increase from the proximity to the lands.
.1-.2moa smaller groups won't do shit at 1k. Higher BC bullets and/or lower SDs/ESs and/or better wind reading will do more for you than small increases in precision.
If you want 75% at 1k you better just use a 4moa plate.
Lets assume you are an expert wind reader(to 1mph) and nail the atmospherics perfectly and your load is
.2moa(it won't be) and every bullet has the exact same BC( they won't).
My 147eldm 24" 6.5grendel load(2435fps) has the highest hit % over all other weights 72%
Same but in .223 with a 90gr VLD @2700fps(24" velocity) 68% hits on 1.5x1.5moa plate
Same but in .223 with a 80gr eldm @2850fps(24" velocity) 69% hits on 1.5x1.5moa plate
Now I will leave everything but the precision, I will put that at 1moa instead of .2moa.
My 147eldm 24" 6.5grendel load(2435fps) 67%
Same but in .223 with a 90gr VLD @2700fps(24" velocity) 64% hits on 1.5x1.5moa plate
Same but in .223 with a 80gr eldm @2850fps(24" velocity) 65% hits on 1.5x1.5moa plate
So you can see going from 1moa to .2moa only gives you a few % increase in hits at 1K. If you are at 40% now getting your precision into the zeros won't help much.