Looking to build a mid weight (10 lbs) rifle in a light weight SA cartridge to get to max 1200-1500 for hitting rocks/steel/paper but will probably do some varmint hunting also. .243 has my attention the most with one of the 6.5 variants not far behind. My wife will be using this most of the time so I want it to be something comfortable for her to use with low recoil. Does the .243 give up anything to the 6.5s? I'll probably buy factory and rebarrel once I know the limits and get a feel for exactly what she wants (bbl weight, length, twist, taper). Setup will be a M40A-1 HTG style stock. Not looking for a heavy/awkward bench rifle.