Super Sneaky Steve
New member
May I suggest weighing the +p+ cases and then weighing a non +p case made by the same manufacture and see if it is heavier? If it is then it's extra strong, if not, it was merely to mark the higher pressure of the load in the case.
My +P+ case was 73 grains.
A few random ones were as follows:
64.1
65.5
63.7
65.6
65.6
So yes, it does weigh quite a bit more!