I have a Mod 70 SA with a laminate wood factory stock.( 7 WSM 26" #4 Brux bbl ) I use this rifle for long range shooting off Bags and in the prone position. Thinking the McMillan A-3 Tactical or the HTG ? or a Manners tactical . Manners is a little cheaper than McMillan stocks. Also currently have a factory 2 piece bottom metal . What's the advantage of having a 1 piece bottom metal ? Any suggestions ?