Agree with Travis. Whatever you decide on, shoot it a lot, you will know the gun better than any ballistic program. My choice on the 7RM was because it was offered to me when I had just moved to Colorado and anything new or store bought was out of my budget.
The 243 I scooped it from the classifieds, I had decided I wanted something to get more trigger time on a centerfire and 243 would work in Peru too, so getting familiar is a plus. The fact that it matched the previous gun kind of sealed the deal.
