Help to develop the most accurate possible load with stuff I have

[Rick2001]

Good morning, I would like to ask your help to develop some accurate loads for my rifle with the bullets powder I have available right now:

Rifle: AR platform with 20" bartlein heavy barrel, superlative arms adjustable gas block, CMC 3.5 flat trigger, Burris 6.5-20x50 scope, American defense 20 MOA scope mount.

Bullets available:

-Nosler Partition spitzer 125gn
-Speer Gold-Dot 120gn
-Barnes Match Burner BT MAtch 120gn
-Hornady SST 129gn
-Hornady (no reference in Hornady catalog) 123gn B.C. (G1).420

Powder Available
- Win 748
- CFE
- BL-C2
- H4198
-Alliant 10X
- H322

Winchester SMALL RIFLE PRIMERS

Mixed once fired cases





Thanks in advance