Recommend second caliber barrel?

[jjrothWA]

An upcoming gunshow may have a dealer with uppers fro about $90, I want to get a second caliber, thinking the .450 Bushmaster or the 7.62X39.
Present thinking is the .450 for being allowed in MI southern deer zone and its 300 yard range.

7.62X39 due to more availability, using SAMMI chamber or Mil-spec???

What are decent manufacturers to consider?

thanks.

[emmagee1917]

I went with several extra calibers in several uppers. Went with .300 Blackout in a SBR and a carbine and a .458 Socom in a carbine to start . I have suppressors coming in both calibers . I also went with a .50BMG upper and a " can cannon " upper . I'm now working on lowers for them all . It's hard to stop .
Chris

[Litt'le Lee]

I have 3 AR's in 7.62X39--one made with a 308 bore allowing more bullet choice--McGowen barrels--the other 2 a 16 in and a 20in stainless--all shoot great

[holdover]

built one in 6.5 Grendel, like the dime size groups at 300 yds.

[GA-Dave]

I second the grendel. I am very impressed with the cartridge.

[Dan in NH]

for the AR platform go with the 6.5 grendel

[Art]

7.62 x 39 is a good cartridge and inexpensive but can have feeding issues in some AR rifles. The .300 Blackout provides similar ballistics without the feed issues and has the bonus of using standard AR magazines. Unfortunately it also costs a bunch more.

[Litt'le Lee]

the 300 blackout--very expense--I'ts a pistol round !!--most 7.62x39 ar's are usually prone to BAD MAGS--i'VE NEVER HAD A PROBLEM--ASC 20 rounders

[emmagee1917]

the 300 blackout--very expense--I'ts a pistol round !!

Really ????? Pray tell , in which pistol was it introduced in ?0
Chris

[Darreld Walton]

I've been leaning towards the 458 SOCOM for a pistol build. Want something with ballistics approaching 45-70 to strap to a pack frame if I make it to AK for another moose hunt, while hauling meat, or to have around camp. My thoughts are that I want "rifle" bullets that will hold together and penetrate come hell or high water.
I've also been looking at building another upper and making it up as a .30 Carbine. Haven't been able to 'like' the Blackout, or Whisper, or whatever they're calling it these days. Same for the commie rounds, effective as they are. Might as well use those rounds in the weapons that were developed with them, and not have to worry about mags, or the odd bore size issues.
I figure that a guy HAS to have a 'dedicated' .22 upper!

[Litt'le Lee]

Introduced in AR Pistol !!!--sub sonic !!!! is pistol round--45 colt would have more Knock down HEY if you want to pay that much for ammo ,,7.62x39 is far superior

[BudT]

Darreld, if you want a bullet that will hold up to bone and penetrate deep or pass through try out the Barns TTSX bullets. I use them in a couple of my guns for hunting and they work. If you want I can show you the pics of the wound on a buck I shot last season. Adding another part now, but if I were to have a AR platform and if it was in 7.62X51 and I were to add a second caliber it would be the .338 Federal.

[M1Riflenut]

Look at the 375 socom. That' my next build. Already about half way there on parts. Did a .458 socom last winter as well as a 7.62x39. Did a supressed 300AAC 2 years ago. The 7.62x39 is a real hoot to shoot. I run the cheapest junk ammo I can find and it has had zero problems and is surprisingly accurate. Used a Green Mounatin 16" lightweight barrel and a cheap red dot and I can boringly bust clays at 100 yds. It's my new "range blaster beat on" gun. Cheap to build and cheap to feed. I use ASC mags and have no issues with it. Only "non standard" thing I did was use a buffer spring for a 7.62x51 AR carbine, vs the standard 5.56 carbine spring.

[Darreld Walton]

Darreld, if you want a bullet that will hold up to bone and penetrate deep or pass through try out the Barns TTSX bullets. I use them in a couple of my guns for hunting and they work. If you want I can show you the pics of the wound on a buck I shot last season. Adding another part now, but if I were to have a AR platform and if it was in 7.62X51 and I were to add a second caliber it would be the .338 Federal.

I'd REALLY like to see the .338 Federal, or even the .358 Winchester put up in one of these....... https://www.henryusa.com/rifles/the-long-ranger/
Or something like this..... http://www.browning.com/products/fir...stol-grip.html

[BudT]

If memory serves the BLR was chambered in .358 Win. I shoot a Ruger Hawkeye chambered in .338 Fed. and love the thing, I think some AR platform rifles were made in the .338 Fed. Also Starline just announced adding .358 Win to their lineup a definite + in my opinion. I hope they make the .338 Fed to, their brass is in my opinion the best out there except for Lapua. Even better if they made a line in small primer pocket. Recently I bought one of the Rem. 700 200 year anniversary rifles in .243 if I shoot out the barrel I will re-barrel it to .358 Win. it is a true short action. I missed a nice bull a couple of years ago with that .338 I would have really liked to see how it performed on something that size, maybe next year. Look up the energy and ballistics on both ctgs I think they will both surprise you out to 300 yards.