The range can be any distance, whatever distance you're running the competition; usual is 1, 2 or 300 yards/metres.
Targets are usually "Figure 11" which is the advancing soldier target (don't know the American equivalent designation).
Scored on hits only, it is supposed to represent battle conditions.
Goal is more than 38 rounds/minute on target with a Lee-enfield; should do much better with a semi-auto (but we're (Brits) not to be trusted with them!!)
Current British record is 38 shots within 12" at 300 yards with a standard SMLE.
Is there a required stance? (standing, sitting, prone, etc)
Nope but most commonly Prone. Most service rifles will have at least a practise done standing, sitting or kneeling & prone. We also do one standing in a foxhole/trench.
2 Sighters and 10 shots to count. Target figure 11 on a 4 foot screen with a central 8 inch band running verticaly on the target scoring 5, remainder of the fig 11 target scores 4 and a hit on the screen scores 2 Practice HPS is 50
Practice 2 KNEELING SNAP
2 Sighters followed by 10 exposures of 3 seconds only one shot to be fired at each exposure. Target Figure 12 with 8 inch vertical central band scoring 5 remainder of Fig 12 scores 4 Practice HPS 50
Practice 3 RAPID FIRE (Mad Minute)
Unlimited shots firer starts standing up in the alert position rifle loaded with 10 rounds bolt closed and safety on. The appearance of the 4 foot screen (as Used in practice 1) is the signal to adopt the prone position and fire as many shots as possible in the one minute the target is exposed. Reloading by clips on demand scoring 5 points per hit on the fig 11 Practice HPS (the record is 38 rds in a minute acheived just after the first world war by a British Skill at Arms Instructor so we shall say the HPS is 38 x 5 so 185 anyone beats that they have cheated!)