I've been wanting to use these so when I ran out of and could not find my favorite Precision bullets I went ahead and sighted in these in my .45 cal Omega. I'm sighted in at 3" high at 100 yards with a 3" group so I'm satisfied with that. However, after reading more on Powerbelts here, I need to ask the experts a question. Is this load going to be to light for mule deer up to 200 yards shots? Please help me on this as I leave for NM in a week and I need to know if I'm going to have to reinvent the wheel and work up another load. As always thanks for any input.