Re: Irons before optics
Well, in the army I trained SDM's. The first thing we did with them was to strip the rifles down and start from scratch. We didn't want loose barrels being an issue and these were plain jane M4's; sometimes we borrowed M16A2 lowers from batt. and used those in conjunction with the M4 upper. That seems to help a lot first off.
In about 4 weeks they were all capable of shooting fairly accurately to 600m using irons and ACOG on those M4's. They started out shooting NM, and this is very important. The NM course is shot using the irons and the shooters are focusing on fundamentals hardcore. We even outfitted them with makeshift NM gear to tighten groups. They called all their shots and learned to spot trace. It was a very good course and a LOT of fun.
Learning to shoot with the sling and irons in those NM positions was the best thing I ever did to improve my aim. Now the upside to this is that you can go shoot and learn all of this as a civilian at organized shooting events. They are a lot of fun are full of like minded people who generally like to share knowledge (until you start scoring better anyway).
I suppose the biggest hurdle is to be still, and a good hint here is not to chicken wing it. Keep those elbows close in. Muzzle should be inline with the firing side foot, a STRAIGHT line, not canted like you always see when prone. This directs recoil directly through the entire body and moves it less, thus affecting the next shot less --and one shot on target isn't shit, it is those following shots that make a group that determine the skill of the shooter combined with the capability of the weapon (skill of shooter is more important; you won't know if you have a 2MOA rifle or a 3MOA rifle if you can't eliminate your own variables). Little details like this matter just as much as mastering irons, trigger pull, etc. With irons and no magnification, it makes it essential to either be perfectly still, or to be able to pull the shot when needed when the "wobbly" irons move over the target. Since you never really can eliminate all the movement totally, it is all about eliminating variables, so the better you are at holding irons over a target as small or smaller than your front post, the better you will be at holding a fine crosshair with 10x at 600m, no?
Finally, all of this is directly transferrable to a small bore or air rifle at very close ranges, and those air rifles are a GREAT way to improve the fundamentals. Samurai used to practice shooting bows at targets just a few feet away. Then they transistioned to shooting off a running horse at range, and those guys pull off William Tell type shots all the time at 30mph. Now THAT is marksmanship and hats off to those guys BIG TIME. The mindset of the samurai, without sounding cheesey, is kind of what you want to think like.
Good luck and safe shooting!