WB
Just for the interest, some strange physics
Saturday, December 20, 2025, 18:41

Roman bought into playing with the 8.6 Blackout. It’s basically the old .308x1.5 necked up to .338. (I mean based on the 6.5 CM, .30 TC). He had an AR10 platform so he bought an upper assembly. He plans on shooting suppressed. His ammo is a monolithic alloy pointed (!) 285 gr. running right at 1050 fps. It’s like shooting a 9mm carbine.

The strange thing is this sort of experimental rate of twist. A bit wild, the bullet makes one revolution in 3” of bore travel. I’m not sure why it doesn’t unscrew your arms upon firing. lol. But it’s something new they are trying. Because of this you can’t shoot normal bullets with a core. It will disintegrate them, possibly in the muzzle break! I’d love to toy with some water dropped cast (monolithic alloy you know) but I’m not sure what they can handle in that twist without stripping through the rifling. But it might be interesting to see. I think I have a 220 and 280 gr. .338 mold.

I thought you guys might find it interesting. It might be a gimmick or the start of something new. History takes time. The bullet rpm rather than 90,000 rpm of a more conventional fast twist .224 is in the range of 300,000 - 400,000 rpm. They say it does some wild performance things with energy transfer at the subsonic speeds. Just something different.