Might look into the .300 blkout as well.. if you have an ar15, you're looking at a cheap swap of the barrel, and gas block and tube, flash hider... or just build an upper..
compare the .300 to the 6.8.. you might be surprised
I and a lot of my friends have tried the 300 Blackout.
It is woefully inadequate for pigs.
Interesting.. myself and a lot of my friends have had a lot of success. Sounds like user error to me..
Not user error, just different requirements.
Think contract elimination on 1000+ acre ranches in a target rich environment.
The 6.8 is a nice balance of knockdown, accuracy, range, rapid fire, weight and proper bullets for the job at hand.
The 300BOs did everything right except consistently drop moving pigs.
A lot of times, the problem with any particular caliber is getting proper ammo to shoot pigs.
Most of the stuff is targeted to deer or other soft skinned critters.
That drives a lot of folks, myself included, to handload so you can get proper pig ammo.
Another problem with the 300BO is lack of proper bullets designed specifically for that gun AND to take thick, hard skinned stuff like pigs.
Plenty of soft skinned bullets OR bullets designed for 30 cal guns that push the bullet much faster than the 300BO.
The 300BO was designed for close up defense against soft skinned stuff at limited range, possibly suppressed - none of which I do.
You might also look into a 7.62x39 upper mounted on AR15.
Ammo is pretty cheap and when shot thru an AR upper will easily deliver MOP (Minute Of Pig) accuracy.
The 7.62x39 built uppers are much more reliable than just a couple of years ago.
It does require a dedicated magazine also.
MidwayUSA has a 7.62x39 rifle kit on sale right now for 409.95.
It comes with complete, built upper and all the parts minus the lower receiver.
You could pick up an Anderson lower receiver and have a pretty nice AR47 for under 500.