Data for 395gr Sub-x in 450 Bushmaster

[mavracer]

Looking for a starting point with AA5744, I have WW296 also, but would like to use the 5744.
Midway has seconds of the 395gr sub-x now, at least I'm 99.9% that's what they are Midway won't say.
Gun is a 14.5" AR carbine gas. I plan to eventually getting a suppressor for it.

 

[reddog81]

Any luck finding any load data?

 

[mavracer]

Any luck finding any load data?

Nope. The min/max charge for the 325 Barnes is 31.6/35.1 my SWAG would be a max charge for the 395 to be about 30 or 31 which should still be supersonic by a good margin. I'm guessing about 24-25gr to be subsonic.
I'm in no hurry I still have about 50 of my 300gr XTPs and almost 2 boxes of factory Hornady Sub X. I also have a finicky 224 valkyrie to work up a load or two.

 

[reddog81]

Nope. The min/max charge for the 325 Barnes is 31.6/35.1 my SWAG would be a max charge for the 395 to be about 30 or 31 which should still be supersonic by a good margin. I'm guessing about 24-25gr to be subsonic.
I'm in no hurry I still have about 50 of my 300gr XTPs and almost 2 boxes of factory Hornady Sub X. I also have a finicky 224 valkyrie to work up a load or two.

FWIW the Hornady factory subsonic ammo didn't cycle my Bear Creek Arsenal rifle upper. I order some of the 395's from Midway to day. I'm not sure if I'll try them in my AR or just stick to my Ruger bolt action. Expensive little buggers even as "factory seconds"

 

[mavracer]

FWIW the Hornady factory subsonic ammo didn't cycle my Bear Creek Arsenal rifle upper. I order some of the 395's from Midway to day. I'm not sure if I'll try them in my AR or just stick to my Ruger bolt action. Expensive little buggers even as "factory seconds"

The factory rounds work in mine, I'm not running a suppressor (YET) so I don't really need to stay subsonic. Yeah they were pricy but cheaper than the Makers. I was originally gonna sell my AR 450 stuff and get a RAR. But when I had to buy mags for the 350 anyway

 

[reddog81]

The factory rounds work in mine,

Good to know it’s possible. I read a few reviews and a common theme was that they didn’t have consistent results. I only tried 3 rounds in my AR and none of them functioned so I stopped trying.

Accuracy was very good with the 3 rounds at 50 yards but I figured after going 0 for 3 I'd need to change the buffer spring or change out the gas block before sending more $2 per rounds down range.

 

[mavracer]

Well to be honest I only shot 4 rounds but it cycled fine and locked back on last round. 14.5" carbine gas, A2 rifle buffer and tube. It has a Witt Machine SME that might add a smidge of backpressure but can't be much.
Accuracy was great. I shot one with no ears and the SME made the Subs sound like a long barrel 12 guage with dove loads IE ok for a round or two hunting way better than the tank style brake I had on it. Nothing's free though now it kicks quite a bit.

 

[mcb]

I have loaded 405 gr bullets with Vihtivuori N32C for a subsonic 450 BM load. It would cycle a 16 or 20-inch suppressed but not unsuppressed. At 1050 fps from the 20-inch it was right at the pressure limit for the cartridge.