Can anyone offer anytips for the USMC rifle range?

If you're looking to increase your score slightly, it seems to me that concentrating on the front sight post, trigger pull, and natural point of aim is where you need to focus. Are you using optics or iron sights? I'm a prior service Marine and I hate going to the range with the Army. I miss the days of snapping in and firing for an entire week. It was always a nice two week break from unit life.

Once you're into your firing position and have good sight picture and alignment, close your eyes and take a 3-4 second deep breath then open them. If your sights are still on target then you're good to go. If you open your eyes and your sight picture has changed, your position isn't good and you need to adjust your body (not your weapon) to regain the sight picture until you can close your eyes for a deep breath and then seen the same picture when you open them back up.

Practice your weakest positions. For most of us that's the standing position. For others it's sitting or kneeling. Wouldn't hurt to do some off duty target shooting as well. When you snap in don't snap in on the painted targets. Find a tiny mark like a small rust spot and practice your fundamentals on that. Also good practice if your unit decides to send everyone to a division level shooting match considering the 200 yd portion has a smaller patch of black to aim at.

bone support, strong steady position (especially when it starts to hurt) slow steady trigger pull, breath control, focus on the reticle not the target. take your time when you do your BZO

Everything they taught you since bootcamp. Proper bone support, steady breathing, don't stare at the target, slow steady trigger pull. Only shoot at your natural respiratory pause. Dont get rattled if a shot doesn't go where you expect it.

Get into your position, get sighted in, breathe in, breathe out, are you still sited? Site in, close your eyes, breathe in, breathe out, open your shooting eye, are you still sited in? If the answer is no then you are muscling your rifle around. Take all the time you need during the slow fire period. There is no rush. The secret is having your entire body in position so when you breathe out the weapon is on target. Practice, practice, practice. When you are tired of practicing, practice some more! I normally shoot in the mid 240s.

For the time portion you have plenty of time to get sited in, do not move your feet when you stand! On the whistle, get back down and spend 10 seconds getting sited as above. Slow is fast here. 1 shot every 2 seconds is good. 10 seconds to switch mags. 5 seconds to site in the second round, 1 shot every 2 seconds. Find a rhythym, relax, you need to almost be a rag doll.

BRASS - breathe (out), RELAX, aim (if it ain't on target then stop here and adjust your body!), stop (breathing), squuuueeeeeeeez. The shot should surprise you.

Breathing and slow steady squeeze to the rear. The fundamentals are there for a reason.

Only Marine range I ever fired was the KD at Snead's Ferry. The pit crew will put up a marker where your shot hit or Maggie's drawers if you missed

Well you have whole week to shoot to qualify, most points are dropped on the 200 offhand and 300 rapid fire. Must be different course now that I take another look at your post, max back in the day was 250. What I'd do is to first but a good pair of shooting muffs and skip just earplugs, I might also double up and use both plugs and muffs. The firing line is noisy, quieting it down will help your concentration. Second, you can never hold a rifle steady but your looking for the final squeeze as your circles slow and tighten, for offhand you might even control the direction a bit. We used iron sights , so I'm supposing you guys are using red dots, but you can still start under the bull and let it drift up into the bull as your squeezing the trigger. Got to be slow you can't chase the bullseye. But good solid positions are key, snapping in week is boring and it sucks a bit, but that's really basic too.

Find a good PMI!