I tend not to load to max in most cartridges but usually close.When shooting in hot weather it may not bethe charge weight as much as letting the rounds get too hot in sunshine before Being chambered. This is only aggravated by then shooting them thru a hot chamber. Aberdeen proving grounds define a proof load as a standard load heated to 140 degrees.

"We are building a dictatorship of relativism which recoqnizes nothing as definitive and whose ultimate goal consists solely of ones own self ego and desires."Cardinal Rathzinger