i shot some 45 winchester magnum using the 250 grain barnes bullets and am wondering about the possible overpressure signs. of course i look at the primer and i know to look for the flattening. i have seen primer flattening on several factory loads for other rounds like 44 magnum. these 45 win mag are real close to the same as 44 magnum. for my test loading and buildup i have a contender to use as the test gun, its tough and can handle overpressure i am sure very well. so the question is, whats the best i can do with my limitations to be sure to not have way to high a pressure but still make the most of the loads? other than primer flattening what should i look for? i did chronograph some and the velocity is what i want. let me know your thoughts and thanks!