I notice my post says 0.020 choke - original post says 0.025 choke was maintained for the tests.

Remington hulls have some taper inside, which suggests their wads would not be as wide as those for straight hulls. But, the wad would not easily pass through the 20 gauge at 0.615 per the person running the tests. I would think Federal 20S1 would be wider than Rem, as Federal hulls are straight and thin. I will try to remember to measure some of each plus WAA20 just to see. Have no fiber 20 gauges wads to compare. Have some 12C1 that were created for paper hulls, which are thick compared with plastic, which suggests the wad might be narrower than ones for plastic hulls. The caliper will tell.

Looked at BPI where some of the Gualandi 20 gauge wad dimensions are posted. 0.610 for Sporting 20 to 0.615 for Trap Commander and Brush wad. Not oversized.

We sometimes read that larger gauges handle larger shot sizes better than smaller gauges. Something like up to 1 oz and 8 shot a 20 gauge typically keeps up. 16 gauge keeps up with #6, and 12 gauge is good with #4.