I gave up years ago trying to make sense of some of the local rules/restrictions that are put into place for S X S shoots. But, I came to it from a NSCA background. That doesn't help. It only taints your perspective. For example, many S X S shoots allow no gun or ammunition malfunctions. A misfire is a lost bird on the scorecard. NSCA allows three per hundred.
No matter to me, however. As long as everyone else has to shoot by the same rules as me I'm good with most all of it. If 1/2 oz loads are not specified for .410 by all means use whatever you're happy with.
I love S X S shoots where they give handicaps for sub gauges competing against 12 bores. I show up with a .410 and start out ahead!
