Rost495 your wife sounds like a tough gal and you mentioned muscle mass and her weight of 110. Buddy of mine jumped into Panama (with a Ranger Batt) said his ruck was about 150 lbs, personally I've never jumped a ruck that heavy 118lb was the heaviest I ever jumped with, I was supposed to jump with 125ish once but the jump was canceled enroute. Once the rucks start getting up to that range there is no substitute for size and strength. IMO 170lbs (assuming good physical condition)or so was about where you could start seeing a difference between guys who were good heavy ruckers (100+ lb ruck) and the ones who weren't. Guys under that weight generally couldn't handle it over several days.
