Working with 100 gn Nosler E-Tip (FN Mauser with a 26" Pac-Nor barrel):
H1000 gave the best results closely followed by Magnum, N560 and Reloder 26. All gave high velocity and tight groups.
LRT was good but gave slightly lower velocity than Magnum.
69 gn of StaBall HD made amazingly small groups at 3275 fps and deserves more development.

One unerring mark of the love of the truth is not entertaining any proposition with greater assurance than the proofs it is built upon will warrant. John Locke, 1690