I drew a wonderful unit outside of Estes Park for late season. There is a chance for a big Bull and I want to make sure I put it down if I hit it. I am shooting Remington Core-Lock 180 grain and I have had no problems with Deer and Cows/small bulls but it has been suggessted that I should look at Federal Noslar Particians and TSX loads. Any suggestions? Has anyone shot these loads?