My varmint hunting would consist of PD's out west,woodchucks and coyotes in Maine,and called or over bait coyotes down here.
In Maine I used a 24" AR chambered in 223Rem with 1:9 twist. I started out with 52gr SMK's then went to 40gr NosBalTip's. With this gun I could get some pretty extreme vels from the 40gr bullets. They were pretty explosive on coyotes also.
If I had that same gun I would be using it today. --- SAWMAN