Armed Eye Doc Posted May 5 Report Share Posted May 5 44 minutes ago, 98Z5V said: I'm sure someone is gonna dig them up now based on that statement I'm your huckleberry. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted May 5 Author Report Share Posted May 5 I'm seriously over building ARs. Not joking. I don't know what else I can build. Then, I don't have an 8.6BLK. Fuq that 338 ARC thing, not interested. That's just a fatass 300BLK. If I need something that does that, I'll shoot it with the .338 Fed gun, that shoots like a softy. But, I do not have an 8.6 BLK... FML. I'm completely tired of people giving me once-fired 6.5 Creed brass anyway, when I don't own one. Might as well turn that shiit into some 8.6 BLK... Quote Link to comment Share on other sites More sharing options...
98Z5V Posted May 5 Author Report Share Posted May 5 You know what? Just hit me, right now. 8.6 BLK is based on the 6.5 Creed case. .338 Fed is a necked-up .308 Win case. Already got one, running 225gr Hornady SST projectiles. Instead of fucking around with 8.6 BLK, I'm gonna play with different projectiles in the .338 Fed, and see what I can come up with, and gel test that crazy shiit. I mean, why should I even piss around with a smaller case anyway, build a new gun - when I've got something here with more case capacity in the first place... Let's play... Quote Link to comment Share on other sites More sharing options...
98Z5V Posted May 5 Author Report Share Posted May 5 (edited) Fuk me - just thought about this one. I already have a 9.1 BLK, in an AR. Yeah, the big fuqr. That's the .358 Winchester AR, and it's already shooting 250s. Let's play more, and try to make some subs for both those fuqrs. With some super-heavy shiit. Edited May 5 by 98Z5V Quote Link to comment Share on other sites More sharing options...
308USK Posted May 5 Report Share Posted May 5 @98Z5V I challenge thee to build a .50BLK. ... ROTFLMAO Quote Link to comment Share on other sites More sharing options...
98Z5V Posted May 5 Author Report Share Posted May 5 1 hour ago, 308USK said: @98Z5V I challenge thee to build a .50BLK. ... ROTFLMAO 500 Blackout is alive, and runs. We have the gun down here in AZ, with 2 barrels. Load development has been going on for years. We need a chamber redesign to go further. It shoot 911 grain projectiles, subsonic, past 1k yards. This post is not a joke... Quote Link to comment Share on other sites More sharing options...
98Z5V Posted May 5 Author Report Share Posted May 5 Well shiit, look at this. 340gr Cutting Edge projos in .358... https://www.grafs.com/retail/catalog/product/productId/98463 Quote Link to comment Share on other sites More sharing options...
98Z5V Posted May 5 Author Report Share Posted May 5 Anybody that knows about loading heavy-for-caliber cartridges, intended to be subsonic, knows that the .30 Carbine is king. If a powder works for .30 Carbine, then it works for .300 BLK. If it works for .300 BLK, it works for all this other weird shiit. Rule of thumb. Accurate 1680, H110, IMR 4227, IMR 3031, Win 296, N110, all that. If it ever worked in heavy (110gr) .30 Carbine, it's been used in .300 BLK. And heavy 45-70. My 45-70 powder for 405gr silver cast lead projos is 50.0 grains of IMR 3031. Fuk yeah, let's get this rollin' already... I'm on FIRE right now... Quote Link to comment Share on other sites More sharing options...
308USK Posted May 5 Report Share Posted May 5 On 5/4/2025 at 9:02 PM, 98Z5V said: 500 Blackout is alive, and runs. We have the gun down here in AZ, with 2 barrels. Load development has been going on for years. We need a chamber redesign to go further. It shoot 911 grain projectiles, subsonic, past 1k yards. This post is not a joke... HOLY CRAP! Go figure YOU would already be on top of that. Dadgum ya... LMAO Quote Link to comment Share on other sites More sharing options...
BigNate Posted Friday at 04:08 PM Report Share Posted Friday at 04:08 PM On 5/4/2025 at 8:17 PM, 98Z5V said: Anybody that knows about loading heavy-for-caliber cartridges, intended to be subsonic, knows that the .30 Carbine is king. If a powder works for .30 Carbine, then it works for .300 BLK. If it works for .300 BLK, it works for all this other weird shiit. Rule of thumb. Accurate 1680, H110, IMR 4227, IMR 3031, Win 296, N110, all that. If it ever worked in heavy (110gr) .30 Carbine, it's been used in .300 BLK. And heavy 45-70. My 45-70 powder for 405gr silver cast lead projos is 50.0 grains of IMR 3031. Fuk yeah, let's get this rollin' already... I'm on FIRE right now... Folks in the 8.6 groups have used a variety of powders - but I'd guess that 95%+ of folks are using either AA1680 or N110... I've bought those - and CFE Black which I've seen folks represent as successful when they couldn't get the other two. So far - I've only taken the time to load the AA1680. Quote Link to comment Share on other sites More sharing options...
BigNate Posted Friday at 04:10 PM Report Share Posted Friday at 04:10 PM (edited) On 5/4/2025 at 8:02 PM, 98Z5V said: 500 Blackout is alive, and runs. We have the gun down here in AZ, with 2 barrels. Load development has been going on for years. We need a chamber redesign to go further. It shoot 911 grain projectiles, subsonic, past 1k yards. This post is not a joke... 510 Whisper with 800gr Lapua Bullex-N (not mine - sadly - pic from a guy in one of the 8.6 groups I'm part of)... Edited Friday at 04:11 PM by BigNate Quote Link to comment Share on other sites More sharing options...
BigNate Posted Friday at 04:21 PM Report Share Posted Friday at 04:21 PM On 5/4/2025 at 1:39 PM, 98Z5V said: Holy SHIIT! Testing 1:7" twist vs. 1:5" twist - the results are very, very devastatingly different! Ran the 75 Hornady HPBTs through both guns. The results are shocking, what that 1:5" does. For shiits, we ran some Barnes 70 TSX loads through both guns... The 70 TSX through the 1:5" tried to turn that block inside out... Coming up is blocks for nothing BUT the 70 TSX, through both guns. I'm working on vids now. I only have vids of the 75 HPBTs. Both times, the hydrostatic force was so great that it literally blew the GoPro off the table, and sent it flying, and shut it off. I haven't even pulled the vid material from the GoPro yet. Working now... What were the velocities on these? If those Hornady 75s were going 2910fps (that's the advertised MV for the Hornady Freedom 75gr Match rounds) - they'd be spinning almost 420000 RPM at the muzzle... I'd think that the TSXs would be fine - but I'd be worried that the jacketed lead bullet in the 75gr match bullet turning itself inside out as it leaves the muzzle. Guessing you had no issues - or you would have told us - but that bugger was spinning... Quote Link to comment Share on other sites More sharing options...
Magwa Posted Saturday at 01:11 PM Report Share Posted Saturday at 01:11 PM Isn't the trick for 8.6 blackout that the twist is 1 n 3 ???????? the others you will be trying need a faster twist is that not correct? Quote Link to comment Share on other sites More sharing options...
BigNate Posted Saturday at 11:44 PM Report Share Posted Saturday at 11:44 PM (edited) 10 hours ago, Magwa said: Isn't the trick for 8.6 blackout that the twist is 1 n 3 ???????? the others you will be trying need a faster twist is that not correct? Yes - that’s supposed to be the special sauce for that cartridge. The down side is that there have been plenty of cans wrecked as jacketed bullets rapidly disassemble on exit from the barrel. I’ve had no issues with them when shot subsonic - but my understanding is that as soon as you get into full power loads - it’s smart to run only copper solids. When I started testing jacketed / bonded bullets for subs, I did the maths to confirm that my rotational speed would be about the same as the bullet would see at full velocity out of their native platform. My plinking loads get built with factory 2nd 300gr Nosler Custom Comp bullets… At 1080 FPS out of the 1:3 twist barrel they should be spinning about 266K RPM… at 2800 FPS out of a 1:9 twist 338 LM barrel they’d be spinning about 227K RPM…. I shot about 40 of the out of the 8.6blk - making sure that they all went through paper with a round hole, before I put the suppressor on… At 2200 FPS (about where I could probably get them going with what would be a hot 8.6 load… they’d be spinning 535K RPM. I’ve given some thought to removing the muzzle device and trying it - with some big cardboard target holders on either side of the muzzle - and one in front… LOL Edited Saturday at 11:52 PM by BigNate Quote Link to comment Share on other sites More sharing options...
Magwa Posted Sunday at 12:45 PM Report Share Posted Sunday at 12:45 PM 13 hours ago, BigNate said: Yes - that’s supposed to be the special sauce for that cartridge. The down side is that there have been plenty of cans wrecked as jacketed bullets rapidly disassemble on exit from the barrel. I’ve had no issues with them when shot subsonic - but my understanding is that as soon as you get into full power loads - it’s smart to run only copper solids. When I started testing jacketed / bonded bullets for subs, I did the maths to confirm that my rotational speed would be about the same as the bullet would see at full velocity out of their native platform. My plinking loads get built with factory 2nd 300gr Nosler Custom Comp bullets… At 1080 FPS out of the 1:3 twist barrel they should be spinning about 266K RPM… at 2800 FPS out of a 1:9 twist 338 LM barrel they’d be spinning about 227K RPM…. I shot about 40 of the out of the 8.6blk - making sure that they all went through paper with a round hole, before I put the suppressor on… At 2200 FPS (about where I could probably get them going with what would be a hot 8.6 load… they’d be spinning 535K RPM. I’ve given some thought to removing the muzzle device and trying it - with some big cardboard target holders on either side of the muzzle - and one in front… LOL Crazy! Quote Link to comment Share on other sites More sharing options...
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