From the 2016 IHMSA rules:

C) An incorrect target knocked down out of sequence. If the incorrect target is to the right of the correct target, the correct target is scored as a miss, as is the target knocked down. The maximum penalty shall be two targets for each single occurrence.

http://www.ihmsa.org/rules.html

From the 2013 IMSSU rules:

Targets are shot in sequence, left to right, one shot fired at each target. If a target is
knocked down out of sequence, it is scored as an “O” as is the intended target. The
penalty shall be two targets. For example, a competitor's third shot knocks down the
fifth target in his bank. That shot will be scored as an “O”, as will target five.

http://imssu.org/documents/Rules%20English%202013.pdf


In both cases the two target penalty is clearly spelled out.

What GREAT reasons not to shoot those disciplines!

BrentD wrote: Tue Jun 26, 2018 3:01 pm What GREAT reasons not to shoot those disciplines!

But it makes a great incentive to shoot in order as per the rules. I once had a veteran shooter suddenly shoot from right to left. He hit all 5, but only scored an X on #3 because that was the only one he hit in order.