We've had bad luck with Fiocchi waterfowl loads. They seem to burn dirty and we've had a few duds that burped the BBs out of the barrel.

Remind me of the RIO brand shells.
I bought a couple boxes of upland Fiocchis because they were on sale. Try them next September.
Another question I have is: do you think 3 1/2 give you much advantage / range on Toms? I have never used them, just stuck with 3" loads, but was curious if the 3 1/2 is a worthwhile insurance policy for skirting birds??
PT