If you do use 300 blk we have had very good success with 125 Nosler ballistic tips and h110.

I don’t reload plinking subs as I only use them for the kids. I normally just buy S&b subs as I can get them for 12$/20. They shooters good enough for them to practice with at 50 yards, and out of my gun stay subsonic!!

For expanding subs I use the maker Rex 200. This will be my first year trying it on deer so haven’t seen how it will perform yet. Have a small piece of land I can hunt but it’s basically bow only as the owners don’t want a bunch of shooting early in morning. They are fine with me using this set up though!! 75 yards is my max distance to shoot anywhere there and should be fine with my set up.

Obviously a good 6.5 bullet moving 2600fps or more is more potent, but my kid is still a little recoil/blast shy and even 243 has too much recoil and muzzle blast( need to get there model 7 youth 243 threaded if I can)

Good luck on the hunt. My son and nephew go next weekend!!