For us short range Shooters, enlighten us on what degree of inclimate weather will force a Registered 600 or 1000 yrd Match to be canceled.
I have never been to a Registered 100-200 yard match that was canceled for any reason. I have seen it raining so hard that we woould be standing in 4 inches of water, but we still shot. I have shot when it was so darned cold you could not feel the trigger, and the wind blowing so hard that you had to aim on a spot on the target frame just to hit paper. Never have I seen a Match called. Delayed for fog, but never canceled.
In fact, in 100-200 yard, you shoot as long as you can see something to shoot at.
So, without having to trudge through the rule book, exactly when do Long Range Shooters say "that's it".
Jackie, I've seen a few canceled. Never a National. The 1,000 yard Nationals I've been to (all IBS) always have a rain day built into the schedule. This is the club's responsibility, not the IBS's.
That said, there are two things different about a 1,000 yard match, the target, and seeing.
The target paper is significantly lighter than what is used for point-blank benchrest. And bigger. As it get wet, it gets very hard to handle, and very hard to score. All that area also gives the wind more opportunity to blow a target loose, or just tear.
Use better and heavier paper stock? It's 42-inches square. Pretty expensive, if it could be done.
And seeing. Next time it gets to raining pretty good, see how far down the road you can see. 100, 200 yards, not too bad. Over half a mile, not so good. You just can't see the target. Since it's harder to see, "bad" conditions last longer -- sometimes all afternoon.
The final thing is pits. There is suppose to be a protective overhang, but it's for bullets, and many don't have a deep one. If the wind's coming from the wrong direction, you get very wet. OK for the shooters alternating pit duty, I suppose, but the other people who have to spend eight hours out in the pits might rebel. Pit duty is a bit rougher than changing targets, at least when done well.