I've killed about 10 coyotes now with the 53 grain vmax out of a 223. They were all one shot kills but they were 300 yards and under.
I would have thought they would be light on yotes too. But I read a thread today where there were multiple posts of yote hunters happy with the 53 gr vmax. They work great on rats and two badgers we shot out to 200 yards. Mine is leaving the HBAR @3080 fps.I would also think on a coyote they would be a little light. I'm shooting groundhogs and other small stuff with them. For bigger stuff I would probably use at a barns tsx or maybe the 64gr nosler solid base, both plenty tough.
Run an old school aluminum mag and you can seat them further out than a plastic magpul.I've got a ruger predator with ar mag. I loaded them to mag length so I could shoot them in either it or my ar. Only shot them from the ruger so far but they have done way better than the 55 vmax. I've only tried the one powder so far but it's good enough for 1/2" groups with these 53s and the 73gr eldm also. I'm plenty happy with that accuracy for the 300yd max distance I have to shoot. Central nc isn't known for its long shots. I've got some asc stainless 5rd mags that let me load to 2.312 oal but only use them in the ruger.
Yeah my understanding is the AICS mags are the way to go on a bolt action. ASC stainless can be made to get either 2.310" from the factory or with modification over 2.400" on a AR15.I have some asc stainless mags that let me load to 2.312". The conversion with ai type mags let you get 2.500" oal. Need to call and get the parts, wish you could just order them online.