This doesn't count for much, I freely state I have no experience hunting with monos but have shot a few and, for what it's worth, found the federal trophy copper factory ammo to be freakishly accurate.
I live and hunt hogs in California, I use Barnes TTSX 150 grain bullets. They work great!! If you reload try Varget start at 43.5 grains and work your way up. Great combo in my Rem 700 308.