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Oh yeah, I still have some Trailboss sitting on the shelf - will try that.
Be sure your water case capacity is correct for "your" chamber...fired cases make the best vessel for that, whether your cases are made from 30-06, or 6.5 CM, or purchased Alpha factory brass.
Inaccurate data in, equals more inaccurate, and possibly dangerous load data out.
I still have a few pounds of TrailBoss, I don't usually recommend it for sub loads except bolt 308 W with 175 gr SMK 50BMG, and a few others.
TrailBoss doesn't operate bolt carrier in autos I've tried, that run great with other powders.
For bolt guns it's velocity is too low, quiet but leaves too much performance on the sub energy table.
Do not compress TrailBoss. It changes the burning characteristics 98 to 99 % fill is max no matter if pressure and velocity are still low.
For the 8.6 Blk with 300 gr bullets 15.8 gr 1680 was the most accurate with Auto and bolt 3 twist and 6.5 twist, with the 6.5 twist much more accurate.
For subs only the 338 ARC or very similar 338 Spectre are much better cases.
Plus a lighter AR 15.
I'm shooting the 338 Spectre with 6.5 twist. Case fill and pressures are higher resulting in better to complete powder burning.
First time out accuracy was very good with a variety of bullets 160 Barnes to 350 Maker.
The 350 Maker is a maximum effort bullet for this case.
The 160 gr to 315 gr will be better for the average reloader to persue, and easily fit the AR 15 mag without a cutout.
Also Your 47,862 MAP input pressure seems low, for supers and good brass I run 308 pressure since it's a 308 gun with shortened 308 brass...if you need more supersonic velocity, and the bullets can take the RPM of your twist rate.
