[wrench]

300 BO round fired in a 5.56 barrel.

It feeds, chambers and fires, but blows the gun up.

Very bad to have both 556 and 300BO in the same house.

[noprogs]

Agreed.

For the same reason I do not own a 20 gauge so I’m less likely to blow up one of my 12 gauges.

Dude where I used to work brought in a 243 with a stuck bolt, the last shot cleanly killing a deer. After finally getting it open, a 7.62x39 round was found, most of the bullet was still in it! The steel core killed the deer.

Pulled the barrel, set it back, rechambered and good as new. Lucky shooter and a tough old pre 64 Winchester.

[jboot]

.300 BO? .300 Barack Obama?

I know he's the gun salesman of the century, but naming a cartridge after him is too much IMHO.