The 97's used to have more of an advantage when a lot more of the SASS clubs had you stage your long guns vertically, open and empty, in a rack or against a wall. It was harder to pick up and restage your empty side by side, making sure the action didn't close. Now a lot more clubs have you stage your long guns on a flat table or hay bale and it's easier to pickup or restage your double shotgun without having the action close up on you. Also, they don't have as many odd numbered shotgun targets as they used to have. The 97's could have and advantage on stages with odd numbers of targets.
Some shooters, including some of the best, have started using double barrels again, partly because of the previously mentioned changes, and partly because some shooters seem to have that one really bad stage out of 10 or 12 when they have a problem with their 97. They have found that they rarely have a mechanical problem with the side by side, avoiding that one really bad stage. Mark