I haven't used one, but have seen them in the store. It seems that they would work good for a quick cleaning in the field, but I am skeptical that it is as good as a cleaning rod, brushes, jag, patches.
IMHO, those things are a waste of money.
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Now that I have my own bore snake, see my post below.
[This message has been edited by jcoyoung (edited March 27, 2000).]