I've got a Win M 70 Coyote with a 1 in 9 twist bbl. I loaded up a bunch of Sierra Blitz 50 grainers that shot great at sea level, but when I got out shooting squirrels at a higher elevation they came apart. I figured it could have been the fact that the bbl was fouled from the 400-500 40gr Vmaxes I'd already shot or it was the elevation. Never even thought about it being a hot bbl. It was kinda neat watching them come apart but it kinda sucked having a bunch of rounds I couldn't shoot. I was lucky and traded about 1300 of em straight across for 40 gr Vmaxes to a nice fella on the fire!
