Federal 338 sub sonic AR-10?

[lte82]

Does anyone run a subsonic Federal 338 in an ar platform? To me this seems like it would blow the 300 blackout out of the water since there is very little case prep and you can shoot 300gr pills. My only concern would be if it cycles the action ok...

So, does anyone have any info this?

 

[gasdoc09]

If you're going to shoot .338 subs, and that definitely sounds like fun to me, then the 338 Spectre in a small AR-15 would seem to make more sense than 338 Federal in a big AR-10.