Stiffneck,
I did try that in this .22-250, and right at 55 gr. bullets,
I had some keyholing, or just poor accuracy. 50 grain
bullets is the sweet spot with this rifle, and I mentioned
what kind of results I had on just one coyote. One is
too many for me. I have kept the barrel, since I do shoot
varmints, where this .22-250 excells. I do have a
couple of AR-15s, with the twist to handle heavier bullets,
but one is a heavy varminter, which I use for targets, and
colony varmints, and the other is an M4. The M4 could
probably get some heavy loads developed for it, but I use
it as a "quick varmint out the bedroom window" gun, and as
my back-up home defense rifle.
For these hefty northern forest coyotes I hunt, the
6mm Remington, or the .25-06 Remington, suit me just
fine. Even slightly marginal hits, put the dog down
right now. And try as I may, shooting through brush,
yields some marginal hits.
Squeeze