Rebating 308 cartridges for a AR-15

[RonS]

Dave, the Grendal has crossed my mind and so has the 6 Hagar. Just for grins and giggles, would a 8 twist 22-250 be excessive bolt thrust with a rebated rim in my AR-15 project?

 

[shortgrass]

Gee, I just don't understand why they bothered to redesign the AR15 into the AR10, to shoot .308 class cartridges, when all ya' gotta' do is.......

 

[RonS]

shortgrass, good point!!

 

[DaveTooley]

Dave, the Grendal has crossed my mind and so has the 6 Hagar. Just for grins and giggles, would a 8 twist 22-250 be excessive bolt thrust with a rebated rim in my AR-15 project?

Yes it would be excessive. The bolt thrust is based on the diameter of the parent case not the bore diameter.

 

[Ggmac]

50,000 ++ pounds is 50,000++ pounds , 473 bolt face cut down to ? Is still too much .

 

[lloydx2]

Running 473 case head in ar has been there and done that. Successfully too
The problem is the barrel extension becomes dangerously thin. No room for safety
Anything goes wrong and its lights out.

 

[butchlambert]

This is what I use to rebate rims.

I know nothing about the feasibility of 308 type cartridges in an AR.