O.K., I was putting a finish of wiping varnish on SWMBO's orchid table and got bored waiting on it to dry. So I broke open one of the bags of Rockler $4.48 biscuits and decided to separate them into piles of loose, tight, and just right. Baby Bear would be proud.
Here are the test results using a PC577 Type 3 plate joiner: In a bag of 250 #20 biscuits, there were:
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23 too tight
107 just right
124 loose
2 broken
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256 total
I took one of the both broken and loose biscuits, wet it, and inserted it into the slot. After about 30 seconds, it took a pair of channel locks and the application of great force to pull the biscuit from the slot. I'd say the bags are keepers, overall. Repackaged them in labeled zip-lock freezer bags with a bag of desiccant.
You know, now that I think about it, it wasn't boredom that precipitated the execution of this precision test procedure, it was the varnish fumes...
FWIW,
Greg G.