The rubber gets more supple/softer with use! I’m curious, can you weigh it out with nickels? I had a friends with a really old serial number that presumably sat on a shelf a long time, and it actually had stiffened to about 65g. Either way, your fingers will toughen up after about a week of use :P
I run the Leopold FC660M as my daily driver. The weight makes it easily portable and the action is superb. I tried to like my WhiteFox, but ended up sticking with the FC660M. Cherry Brown with O-ring dampers.