I tried a couple Cabela's brand choke tubes last year with a couple different types of lead shot. The super-full patterned tighter than the extra-full tube. I didn't pay extra for the ported tubes, doubt it makes much difference.
The biggest surprise was when I tried Remington #5 buffered lead turkey loads. They patterned much tighter than the Winchester #6 plain lead turkey loads; gave me at least an extra 10 yards range.
Also found out that tubes for my Mossberg 500 are threaded the same as Winchester, Weatherby, and Browning Invector (not invector plus) tubes.
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