I've always been a fat-ass (somewhere from 15-25% BF) so I've also never experienced considerable loss of muscle tissue (at least as far as the scales tell me)

I've always been a fat-ass (somewhere from 15-25% BF) so I've also never experienced considerable loss of muscle tissue (at least as far as the scales tell me) - however the body-builder club are at 6% body fat when cut and at what, 12-15% when bulking? They are absolutely going to metabolize muscle tissue when cutting.