ARCHIE is right about the 25yd kneeling position. The same as standing off-hand- on both knees.
The key is to KISS, keep it simple.........
For two hand unsupported: use same modified isocles position.
For kneeling, same, except for on both knees, cheek of butt on heels, heels together.
For right and left barricade, use either knuckle against barricade, or back of hand against barricade (I prefer back of hand, either way, a rough barricade will chew on you), -still same modified isocles position and grip!!
Sitting: the left knee up, the arms around the knee, -same grip as kneeling, only using left knee as "rest", with base of grip in groove below knee cap. The right ankle should lock the left fore-foot with right knee resting on ground. (Some shooters use boot on one foot, athletic shoe on other. First person I saw use this was B.N.Curtis of Sec. Ser. I prefer running/athletic shoe on both feet and light colored to keep down the heat in the Southern U.S. summer heat.)
Prone: I prefer to lie flat, again using a modified isocles adapted to lying down. I use only a slight angle to left with my feet. The right foot can be hooked over the inside of the left knee joint if it helps but I prefer to have the most ground contact I can for increased stability. The roll-over position is for those with large mid-sections and can't breath in the flat-prone position.
Shooting indoors is a little different in that the lighting is problematic. Also, the sight settings for the reduced target simulating the 50yd line are different, but your scores should be about the same.
A suggestion for going from 560's to 590's,.......and 13XX's to 149X's........
1. dry fire
2. dry fire
3. dry fire some more !!!!!!!!
If your guns and ammo are up to it (1490's), any thing over 1,000 rds a month in practice is worse than wasted, range work should only be to refine loads/guns, and to "proof" the dry-firing.
4. Shoot lots of matches !!!!!
5. Watch and talk to/listen to the other shooters in Hi-Master class.
(forget the perennial sharp-shooters to expert class shooters, -they aren't interested in improving)
I use a reduced shilouette (off MasterArms ammo -case sized box) to practice the positions, and use door jambs in hallway for barricades, and always time the position.
My wife hates the Click, click.click,click,click,click......repeated 2-3 hundred times, usually 3-4 nights a week, and more often before matches !!!!
(She really enjoys the awards banquets/ceremonies though !)
-work on a consistent grip, and smooth straight-thru trigger pull.
Trying to stage the trigger to "pick-off your shots" will only result in flyers in the 8-ring.
(Been there done that !!!)
Hope to See you at Jackson, Ms next September !!!!
There are several Chicago PD guys that come down every year. A retired MI state trooper shoots with his wife (Kathy Schroeder) in our GA league and "follows" her to the matches- an inside joke- she outshoots him usually and a bunch of the rest of us too!!
Hope your'e in the HighMaster class by then too !!!!
(I'm Semi-Auto and Revolver Distinguished , HighMaster)