Encore man, My T/C quick release mount works great. I take it off and wash the barrel then went out and shot again just to make sure nothing moved as far as point of impact. A friend Of mine had one on a renagade and also said it wiggled. Come to find out he never put the lock screw back in when he was ready to shoot.
85 grains of Trip 7 pushing a green mmp sabot 230 gr. 451 hp xtp seems to work best for me.

Yes the bench seems real solid and I think ya could really lay on it. Best of all it is portable. I do want a rifle rest other than sand bags (shot bags filled with sand).
I have this Idea in my head and will see about starting to get it out tomorrow.
Al