Pick up a box of Speer 180 358FP hot cores.
Size down to .357 with a Lee push-through/imperial wax.
Load over a full/compressed case of RL-7/magazine length 2.26"
https://www.marlinowners.com/forum/r...ml#post8071827
Point-blank minute of ground squirrel out to 200 w/your 18" barrel.
https://www.marlinowners.com/forum/r...ml#post8071005