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[ARCHIVED THREAD] - .308 lower

Posted: 7/23/2013 2:53:02 PM EDT

Hi guys

I have tons of questions on my build but now that I have most everything that I need I have another question. If down the road I wanted another AR10 caliber could I get a different caliber upper for my .308 lower and if so what kind of mods would i need to do to the lower for it to work. Could I switch to a 22-250?

Posted: 7/23/2013 4:51:57 PM EDT

[#1]

As long as the caliber you choose fits on your 308 lower I dont think yo will need to change anything, except maybe magazines..

Just slap on the new upper and go to town

brian

Posted: 7/23/2013 5:38:48 PM EDT

[#2]

22-250 would be an AR15 platform.

Posted: 7/23/2013 5:41:12 PM EDT

[#3]

As long as it has a:

1) COL of ~ 2.800"
2) Has the same case head diameter as the .308 Win.
3) Runs at/less than 62K PSI.

So, all .308 based cartridges will work just fine like the .243 Win., .260 Rem., 7mm-08, etc.
Also in this group, 6.5mm CM, 6.5-284,.300 SAUM,.338 Federal, and a few others/wildcats...

Good luck.

Posted: 7/24/2013 3:36:17 AM EDT

[#4]

Slightly off topic......but close.

Will 338 federal cartridges fit in pmags?

Posted: 7/24/2013 7:39:24 AM EDT

[#5]

Quote History

Quoted:
Slightly off topic......but close.

Will 338 federal cartridges fit in pmags?

View Quote

It should, unless the max. COL is shorter than the 2.800/20" standard.

Posted: 7/24/2013 7:41:14 AM EDT

[#6]

Oops. It was on a list of AR 10 platforms that I saw. I might just have to ho with a .243 then.

Posted: 7/24/2013 7:48:37 AM EDT

[#7]

Quote History

Quoted:
22-250 would be an AR15 platform.

View Quote

RU sure about that?

Edited to add: I guess you are!

Posted: 7/24/2013 7:48:40 AM EDT

[#8]

260 Rem

Posted: 7/24/2013 11:06:17 AM EDT

[#9]

I thought that the 22-250 was an AR10.

Posted: 7/24/2013 12:02:18 PM EDT

[#10]

Quote History

Quoted:
I thought that the 22-250 was an AR10.

View Quote

The 22-250 barrels I have seen are usually for the AR-10/LR-308 platform...Being that the nominal max COL is 2.350" for the 22-250
it won't normally fit in a AR-15 magazine/mag well unless it is loaded shorter...

[ARCHIVED THREAD] - .308 lower

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[ARCHIVED THREAD] - .308 lower

[ARCHIVED THREAD] - .308 lower