I have an AR 15 lower from Stag Arms in .223. I really wanted a 308 for the power and distance. My gun shop says I can put oth

[bcostanzo]

I have an AR 15 lower from Stag Arms in .223. I really wanted a 308 for the power and distance. My gun shop says I can put other cartridges into the lower similar in size to the 223. I want more power and distance in a commonly available cartridge size. Does anyone have any suggestions short of finding a gun in 308?

[bcostanzo]

In case you were wondering I wanted a cartridge for at least deer size game. Thanks!

[Ga hunter]

Check out the 6.8, and the 6.5. I don't have either, but I hear they kill deer very well! And actually have a good bit of reach on them.

[Clay Cooper]

I would go with the 264/6.5 in 129 grain

[scratchgolf72]

you can by either a .300 AAC blackout barrel or an entire upper and it will fit on on your .223 lower. you can use .223 magazines and the .300 AAC blackout rounds will fit in them.

i have looked at this option for my M&P in .223. but after looking at the ballistics for this caliber, it drops like a rock, not flat shooting. besides this is also not what i would call a hunting round, its more of a combat round.