I use to shoot an Encore in 300WM, not much fun at the bench with 180gr. bullets. What I noticed is that often with the same bullet that many doe's I shot would run a short distance after a behind the shoulder shot and bucks usually would drop in their tracks.
Have you guys noticed this and what part do you think hide thickness plays in the start of expansion? The deer were I hunt in SC have a much thinner hide than Midwest or up North.
I would think that the bullet has a little more flesh to react on and therefor tranferring more of its energy into the bigger bucks body, but two shots placed into the same spot on two different big bucks using the same bullet can and usually does teals different results..
These 45 caliber ML's though are deer dropping machines, not much can walk away from a 5,000 foot pound punch...