Hi, I shoot a .300 Win. Mag. I use a 180 grain Partition bullet at the max load for hunting elk. I was wondering what your opinion is on using the 165 grain Partition at a max load for hunting elk? Is the lighter bullet at higher velocities better than a larger bullet moving slower? Or visa-versa? Also, I shot an elk this past season at 130 yards with the 180 grain load. When I skinned the animal I found copper jacketing from the bullet at the exit wound. I was a little surprised. I thought the Partition was suppose to hold together better. Do you recommend that I switch to an Accu-bond? Partition Gold? Thanks, John