I have been messing with .300 BO sub loads obsessively from the day I bought my Remington 700 chambered for it. I have loaded from 86 grains to 220 and finally I have settled on one load. In my bolt I shoot 208 grain A Max with a charge of 8 grains of Lil' Gun. My AR load is again the 208 grain A Max with Accurate 1680 (10.8 grains I think). I am still working on the AR and I would rather use my bolt gun, the AR cycling is too noisy. The only projectile I have heard of that expands at these speeds are Lehigh. Too pricey for me. I have recovered projectiles shot at sub speeds and some could be dusted off and reloaded, they hardly distort. I even went as far as to hollow point some 220 grain Hornady round nose but have never shot an animal with them. I did a phone book test at about twenty yards and they appear to expand but that's hardly a good test. The hardest part I have found in loading sub's is to keep them under the speed limit and then the dreaded squib load, had a couple of them and that spoils your day trying to push it out of the barrel. The 220 round nose aren't as accurate as the A Max and a lot of shooters use 220 SMK's and again, no expansion. Most of the guys I know shooting pigs try to get close head shots, mostly at night with thermal optics. On a coyote I would guess a body shot would be a pass through with some bullet tumbling damage unless you hit a bony area. Don't know what kind of energy a 208 grain bullet has at 200 yards with a muzzle velocity around a 1000 fps, guess it would be like a 45 auto. I have some pictures of the hollow points, remember that's close range into dry phone books. I have had some really accurate sub loads with 150 grain bullets with Trail Boss but I can't get a consistent velocity and after ten shots I have to clean the barrel. Trail Boss is sooty. I have stuck lighter bullets in my barrel except for the 86 grain so I have about given up on those. Wado