Save me some internet searching and help me out.

Is the big difference between small rifle primers and magnum small rifle primers pretty much the thickness or hardness of the cup?

In other words, could I take one of my normal pet loads and just substitute magnum primers and be good to go without having to reduce my load and start over?

The loads and powders I am using are well below established pressure limits to begin with so even if a magnum primer has more pop or bumps my pressure up marginally I should be fine.

Anyone substitute magnum primers for standard primers without issue?

Thanks.