7.5lbs total weight? What rings? Also did you do a 20MOA rail?Copy that, I had that 4-20x52 scope with the TMOA reticle, awesome scope but giant. I was offering my input in line with the OPs 2 choices, the 3-15 vs 3-18 and forgot about the 4-20. Either way you go it's a Leupold and will be a great option on your rifle, I have the VX6HD 3-18x44 on my 6.5 PRC Ridgline. Weighs 7.5 lbs. The CDS turret Leupold cut for me is money to 625 yards, that's as far as I've tested it.