Considering the fact that the shop owner now has to store the powder off-site, unless he is more than 300 feet from the nearest occupied residential dwelling, he might have substantial costs involved in providing BP in a retail store.
I have written here many times now, that dealers and local gun clubs need to work together, as the clubs are a good place to build a powder " bunker " or storage area, away from residential areas. If the club can store its powder there, which it buys at cost, while the dealer uses the same storage area to store powder he sells, the only thing that needs to be worked out is how the dealer gets the powder to his customers.
Club members would be wise to help the dealer out, by having someone deliver the powder to the dealer at least one day a week. Or, of course, the dealer can be given a key to the bunker, and drive out and get the powder himself. But, that will cost him both time and money, which has to be factored into his costs. If the club members deliver the powder, The dealer is likely to refer new customers to the club, for both a place to shoot, and for a " member's discount " on future supplies, and he is more likely to show his appreciation to the club members by giving them member discounts at his store.
Everyone is complaining about the lack of a ready source for black powder. Its about time that some clubs begin to help dealers solve the problem, rather than sit around and complain about it. If you don't solve it, you become part of the problem, as you see a drop in your membership, and a decrease in the club dues you collect to keep the gun club going.
The Homeland security regulations are wrong, and the legislation needs to be repealed, or partially so, because there just is NO history of black powder being the explosive of choice by terrorists. In both the 1993 bombing of the World Trade Center, and the 1995 bombing of the Federal Building at Oklahoma City, the bombers used either gasoline and Nitrogen Fertilizer, , or chemically concocted explosives, rather than black powder. The only explosives using BP that have made the news in recent years were the pipe bombs that the guys at The Columbine HS made, and didn't go off!