I've had frequent problems with using agglomerated corks in my Gilda corker -- I routinely have 10% - 20% of the corks sticking out more than ~1/2".
I don't have the same degree of problem with natural corks, presumably because they are softer(?), but the only corks the two local shops carry are the agg type; I now routinely order natural corks on-line.
Perhaps I don't soak them long enough (15-30 minutes, typically) or the soaking water isn't hot enough (less than boiling, perhaps 150-180F) ? Short of buying a floor-model corker, is there something else I can do to improve the success rate with agg corks?
Thanks,
Bart