these style of loaders sure save time on reloading,,,when they work that is! i suffered a bb loader breakdown at the dec 22nd game similiar to what savage haggis had on 3 of his m4 style bb loaders at the pilgrim game. funny thing is, nothing is broken, and system still functions,just doesnt feed. upon taking mine apart i noticed a small "hook" on one of the "actuating arms" ( for a lack of a better term ) that might be restricting the bb flow into the feed section of the loader. i thought that since it doesnt work as it is,no harm in experimenting and i snipped the small 2-3 mm piece off.
i put it back together and it feeds better than when it was new! im not sure if this will work in every case,but its worth a try.
(ps) watch for a small tiny o ring in the loaders feed tube.