It's more simple than you think Big Daddy!

Loose powder & brass powder measure using 80-120 grains (my choice)

180-400 gr sabot that measures .400, .429 .451 (load without a grunt)
Harvester sabots (if bought separately)

Swabbing spray bottle filled with Windshield solution, Windex, Alcohol or both mixed

Good anti-seize grease for the breechplug like CVA Breechplug & Nipple Grease, nickel anti-seize compound, Choke Tube Lube or Tetra Grease

Good solvent that says it removes copper, plastic or lead.... depends on what bullets you buy.

Bore Brush is a must. Can't clean properly with loading jags.

Loading jags need to be the proper ones so you don't deform bullet tips when loading. Some stores sell an assortment in one package. Some are hollow centers... some are more pointier.

Good gun oil like Shooters, Birchwood-Casey, Rem-Oil, Break-Free CLP. If you buy a bolt/plunger action, you'll need an oil with a real wide range of lubrication. The label will tell you the range.

Absolutely no Bore Butters, Wonderlubes 1000 stuff with sabots. Well maybe just a very light pinch around the plastic sabot to aid loading remaining wrong sabot/bullets you purchased by mistake. After-all, don't throw those difficult-to-load bullets away.... shoot um' up

One last thing... eventually get a good 2nd ramrod to keep in your gun case at the range. It's nice to have one for brush-swabbing... one for loading bullets with a jag. Get a T-Handle or sumthin' similar that screws on for better gripping, force... etc.

After you get her open sighted-in, we'll talk scopes cuz' the Omega prefers one that's a tad shorter due to it's stock length. We may also discuss quieting that somewhat-noisy, branch-banging synthetic stock.