OP, if you aren't going to be shooting it a lot, don't go down the rabbit hole of reloading for it. Save the brass you can readily find and sell it. Don't let training or shooting be affected by where your brass goes and trying to find it. If you do want to shoot it more than the cheap Wolf 6.5G steel case is actually decent ammo for training and reasonable accurate.

Either caliber, stay with a light 16" barrel and low power variable. You will have a light capable weapon usable for short to mid range, well within ethical distances-and user ability. Heck, my son's first 6.5G had an Aimpoint Comp M2 on it, great woods gun.

Great barrels I've had are the Wilson Combat 6.8 16" lightweight ss, AA fluted 16" 6.5G, LMT MRP 6.8 16" and a Shilen Select Match 18" 6.5G.

Let us know where you hunt, terrain and distance and I'm sure you will get guidance on optics.