--Comprehensive Testing--
All I can say is that I'm surprised. For what it's worth, I'm using Home Depot quality Frost King 3/8" Foam Backer Rod, and a brass barrel that is very tight on the darts. I also notice that, from your picture, you appear to be using washer darts (which you said you were) as well as cut darts with holes melted in them as well. I tried a combination of both...it failed miserably. But perhaps your results are different. I don't have enough of an arsenal to do the sort of extensive testing that many of the members of this forum are no doubt able to do.
I'm sorry to hear it didn't work for you, though.


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