Remington 1100s and Benelli M2s seem to be the most popular among serious competitors. I would find a non vent ribbed 2-3/4" barrel for either of your 1100s and cut that down rather than trash a good vent ribbed barrel. With a 2-3/4" barrel the Magnum will run most anything, but beware of real heavy stuff ewith the magnum action sleeve and 2 gas ports. The non ribbed barrels go for cheap, too. Check ebay.
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