I load up my PD Poly, which has the 2 1/2 " chamber with Federal Premium Personal Defence Handgun 000 Buck 410, and Winchester Bonded PDX1 225 gr. 45 Colt. Usually, first two up are the 410. Followed hy 3 of the 45 Colt. The sole SD purpose for me is as a truck/car anti-carjacking protector. With a potential threat being only feet away, the 4 000 plated, hard lead balls stay in a tight group. If an additional threat arises from further away, the 45 Colt rounds are quite accurate. Holding a +- 3" group, off hand at ten yards or more.
I found a cheap Crosman Airsoft holster at Wally World that fits the PD like it was made for it. It has Velcro straps to fit around a belt, but they work to hold the holstered gun to the side of the driver's seat in my vehcles. It also carries well in the woods.
For snake protection, and just great fun blowing up pop cans, spent shotsheels, sticks, and various other debris ten feet of so away on the ground, #7 1/2 shot works well.
Good luck, and have fun with your new Judge.