S1897 Seems to be the Only Shotgun With a Range Buff in PUBG

In PUBG Patch 7.2, PUBG Corp added some significant weapon changes, and focused heavily on the shotgun.

To increase the effectiveness of shotguns for mid to late game, shotguns were given body damage multiplier changes in the aim to see more being used. In addition, there is a decrease in hip firing accuracy, accuracy penalty while moving and damage drop over longer distances.

While PUBG Corp stated the shotgun had a damage drop off at range, the S1897 doesn't seem to be as nerfed, or didn't receive the debuff at all. Based on chart by Redditor Automobilie, the shotgun does fairly well still, "When the DBS was added, all shotgun had their head/limb multipliers nerfed , which 7.2 has reverted across the board.In addition the a couple specific tweaks, there was supposedly a range increase that lessened the harsh damage drop-off that made shotguns unreliable once an enemy backed up a couple steps. If battlegrounds.party is accurate, it looks like only the S1897 really saw a noticeable range increase with the longer double barrel still having a very sharp roll-off around 10m."

Whatever the case, buffing the shotguns was a good move, giving the gun meta a little change, at least at the beginning of the game.