I've been watching a few trap shooting videos, some by top shooters, and it shows them resting the barrel of their o/u (opened) on their toes - with some special pad.
Check out 0:12, 0:45, 1:07, 1:18, 1:28 ..... I'm losing count
So .... it's OK to violate one of the basic rules because the action is open? Many sweep their legs when holstering a handgun, is this similar?