Can anyone offer anytips for the USMC rifle range?

judicious marksmanship has the most effect on ones range score......

Listen to your PMI. Call your shots honestly before making dope changes (or whatever you do with newer optics, we used iron sights). Then just hold and squeeze until you're in the black.

Remember the formula: Breath, aim. trigger slack and squeeze the trigger. also the wind message is very important. Just relax and take a breath hold it take the slack out of the trigger and squeeze the trigger. The range instructor should give you the elevation and windage You should be alright. That is the way I was taught to shoot the M1 in 59. Good luck Marine. Semper fi..

Concentration, and normal breathing techniques.