I've owned four SSK 14" 375JDJ's, but no carbine or rifle length barrels for this cartridge. Their steadiest diet was Hornady 270gr SP's, but they also fed on Speer 285gr Grand Slam's and Nosler 300gr FP's or Partitions sometimes, all driven about 1900-2000FPS. Shot both 220gr and 235gr as well in one or two of them but preferred the others no matter what the target was. I even shot ground diggers with the 270's out to about 300, but only scared most of those around 5. LOL