62gr Barnes TSX bullet works nicely out of my 16" 1:9" twist AR-15. You can get limited reloading data off of the Barnes website for free. For me, TAC pushed it 2892fps & 1152 ft-lbs and that was a full grain under their published 5.56 Nato max. It was quite accurate too! The TSX bullets are a little bit tricky to seat though, you have to have good neck tension if you want to seat at the published OAL due to the case mouth being in one of the grooves (not a crimp groove), otherwise the bullet will flop back and forth in the width of the groove. Kind of have to see the bullet to understand what I am saying..
Another solid performer someone already mentioned is the Speer 70gr Semi-Soft Point. Varget & BLC-2 both worked very well with this bullet with published data (I've run these from 2700-2900 fps, settled on 2775 fps). It is much less costly than the Barnes, which is nice, so you can take your time and work up a nice load that is both accurate and meets your velocity expectations. These won't blow up and will provide the deep hard penetration needed for the hogs.
Safe reloading!
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