outside loop?
Ralph the direction that the outside loop is intered into can give results to determine if the problem is entirely aero related (airfoil, tail power, etc) or if it is just too heavy (wing stalling) , bad CG or bad technique.
Just
1. start in level flight, push over into an outside and see what happens or
2. roll 180 and push up into an outside.
Then repeat the same doing an inside loop.