458 SOCOM AR-15

[davsel]

Ummm....... The ejection ort is on the upper.......

Ummm.... I'm a complete idiot! Thanks for pointing that out.

[MarkCO]

My big bore is a .450BM (and a .450 Corvette Upper) and I have a Burris XTR 1.5-6 on one and a MTAC 1-4 on the other. I think anything in the range 1-4 to 2-7 is a good fit for the 45 caliber ARs.

[Squeeze]

You mention building an upper for this cartridge. Don't forget, you will need a modified lower as well - the ejection port needs to be opened up.

I run a Burris XTR 1-4 on mine, and my Wilson barrel is good to go.s

Good luck with the build, you will enjoy it.

Okay, Dave, no more replying on the forum when you haven't had enough sleep. LOL! Just to clarify, I will be using an Anderson Arms upper specifically designed for the .458 Socom.

[cfortune]

I got a wild hair up my ass and ordered a Tromix 458 upper. Judging by the barrels they sell, I'm guessing I ended up with a 1 in 14 16.25 barrel. Any good resources on loading subs or load data in general? Preliminary research shows for the heavy stuff I should have gone with a faster twist. Most consolidated load data I'm finding is based on 300 - 325 grain pills though. Hoping I can push some 500 grainers through it but I won't be heart broken if I can't.

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[SideShow Bob]

Here is a link to some data on loads for the Hornady 325 gr. FTX pill, from a reliable .458 SOCOM source :

http://www.teppojutsu.com/downloads/...ad_325_ftx.pdf

[Squeeze]

Any idea on what weight carbine buffer you use for a .458 Socom?

[20X11]

Standard carbine buffer

[Squeeze]

Standard carbine buffer

Thank you 20X11!! I happen to have a couple of those laying around in my spare parts box.

[davsel]

I purchased my build kit from Wilson Combat and it includes a heavier buffer spring and an adjustable gas block - Runs flawlessly once it is tuned.

[Squeeze]

Once I get the Tromix barrel, the muzzle brake, and BCG, my .458 build will be complete.