A1680 for subs, you might need to change the buffer weight out depending on if you have an FA carrier or not and what the gas port/block are.
I use regular Hornady dies, never needed anything fancier. The dies are not the limitation here, the barrel, chamber, and overall specs of the AR are what will hurt group size a lot more than reloading tools.
Berrys Bullets are awesome for subsonic blaster rounds. Gilded metal 200+gn cheapies that run very well and don't break the bank when you're shooting high volume.
IMO cough up the $200 for a Form 1 and SBR the lower, the 300 BLK only needs an 8" barrel for subs and that drastically reduces the overall length compared to a 16" barrel + suppressor. Don't be disappointed for how loud it is with the can on - you can't do anything about the gas port noise on an AR, but have someone else shoot it and stand 10+ yards away on the offside of the rifle and you'll be shocked how quiet it is overall.
So, I don’t necessarily need ‘small base’ dies?
Correct, it's a very low pressure round, no blown primer pockets or expanded heads here. Only the top end of supers are going to crack 50k, and you can get similar velocities at lower pressure by changing powders.
Also…..you ever load bullet weights from 190gr on up to 200+?🤔
That's really the point of the Blackout - subsonics through an AR-15 platform. The supersonic ballistics and rise of specialized flat base bullets like the Barnes Tac-TX are just icing on the cake at this point. It'll never be better as a super than pretty much any other .308 cal out there, but will hold it's own well enough. I prefer short action 6mms to the 300 BLK for supers, but the ability to change between the two only by changing out the mag is a big plus for the 300 BLK.
Another must have: buy a Wilson case gauge.
Would have to be their brass min-dimension gauge. Wilson's standard case gauges are for fired brass, very useful for headspacing but they're not a checker gauge. If you want to ensure function in a SAAMI spec chamber a Hornady, Lyman, Sheridan Engineering, or Dillon gauge are better choices.