Coupla responses...
To B.L.E.,
I think the organizations are wise to set the rules as they do. Three reasons:
1. More safety in some instances is better and this is true almost without regard to the additional time or inconvenience created by the rule. (Two people shooting together is more than twice as dangerous as one shooting alone.)
2. At such events, there is no way to be certain that all of those present have the same attitude toward safety and so to reduce the situation to what one might call the lowest common denominator is (IMO) about the only smart way to do business.
3. These organization are not prepared to handle the fall-out of an accident. Someone gets hurt at one of the events, and the liberal press attention and potential litigation could destroy not only the sanctioning organization but could harm the shooting world as a whole.
I don't like these rules (So I don't go to such events, nor do I shoot at established ranges of any kind.) but I do acknowledge that in some instances we can't operate without them.
To Chestnut Forge,
Mykeal has a very good response regarding the accurate measurement of powder including the different weight to volume of the different powders we might use. It is very interesting. Hope he is reading this and perhaps he will respond. I have come to the conclusion that the best way to look at accuracy of the firearm is consistency of the charge. Some years ago I developed a little telescopic measure for CVA 1400 flask. I troubled myself to no end trying the mark the measure with the weights it was throwing until I finally gave up marking it with specific weights and just allowed the marking rings to speak for themselves. So, for example, my Walker shoots best when the measure is set to one ring, and my Remington shoots best at another ring and so forth.
Back to B.L.E.,
Good points and your post goes to where I was going based upon Mykeal's standard response when addressing different weights to volume of different powders. Most measures are volumetric which means they are almost always wrong as regards the weights of charge they throw. I have never found, for example, a 30 grain spout for a CVA 1400 that actually throws 30 grains of anything. But as your post implies, I like the .30 grain spout using Pyrodex in my .36 caliber brass pistols.