Absolute Giant

I have sort been lurking on this one but I guess noe I will add my 2 cents. Since your gun is new it will probably have a real "tight" barrel, therefor Powerbelts will load easily and most sabot/projectile loads will be tight. For awhile until you get that barrel broken in you my have to use any of these sabots to get your loads down snugly.

TC's - yellow super glides
Hornady's - Low Drag
Harvester's - Crush Rib
MMP's - HPH-3p-EZ load sabots...

My Omega has been shot a lot and the barrel is broken in so at this time I am using MMP HPH-24 Sabots or the regular Harvester sabots...

Here are my most favorite loads...

for Elk
100 grains T7-2f (loose) .458/300 grain(45-70) Nosler Partition PP, HPH-24 Sabot, 25 acp ignition
for deer
100 grains T7-2f (loose) .451/260 grain Nosler Partition HP, HPH-24 sabot, 25 acp ignition

These bullets are expensive so for an alternative and a bullet that I can shoot paper as well as big game - I am moving to the Speer Gold Dot Bonded HP's, either the .452/300 for elk or the .452/250 for deer. Same powder load and sabot.

I buy all of my bullets in bulk reloaders boxes and order the sabots separately... trying to keep cost down. Buying bubble packages of bullets and sabots can really add up.

Good luck with your new gun...