What's noticeable when using the magnum large rifle primers, is the carbon build in the flame channel is less. The build in the flame channel, seems softer when using the Federal large rifle magnum primer.

Another thing noticed is that the flash hole doesn't erode, and grow larger. One of my breech plugs had over 700 shots through it, when i quit counting. The rifle primers seem to burn cleaner.

Can't say anything about the 'force'. Wouldn't know how to measure it.