Welcome! You will find there are many good answers so keep that in mind. Lot of guys with great info on here. So I think before answering we need to know how far you want to shoot elk at. I have had both 7 PRC and 300 PRC. Both are long range hammers in my experience. In factory chambers, the PRC's will edge out the win mag/Rem Mag. Barrel life will be similar for all. I'm not sure I would consider any of them a barrel burner. Probably be 1200-1500 shots per barrel. I was in the same boat as you with trying to find a dual use gun. In my opinion, if you plan on shooting a lot long range, all of them will be expensive and abusive. Most hunting rifles are below 12lbs if not 10lbs and with that being said 12lbs or less can be more of a challenge to shoot LR accurately. I'm not saying impossible but it will be more of a challenge. Also not sure how many shots you are sending but either of those can be challenging to find readily available components as well as use a lot of funding to keep feeding quality components such as H1000. If you are planning on shooting 90/10 like you said assuming you are keeping your elk killing under 600 yards, I would lean 6.5 PRC. It uses 10-20gr less powder, quality brass is about .45 cheaper, and a lot more manageable recoil. Like I said, I have my 7 and my 300 but knowing what I on ow now they wouldn't be a first choice for me for a lot of shooting. Just my 2 cents.