My ultra varmint shoots Hornady ammo real well,,I don't reload as yet,,may not ever again,,but still save brass just in case.....anyway I've shot the 75gr hp and the 58 gr v max with as good as 1 inch 3 shot groups off bench at 100 yds.
Also bought 100 rounds from Cabelas when gun was new of 75 gr v max made by HSM,,Hunting Shack Manufacturing,,best group with that was 2 to 3 inches.
Polish your bore and chamber with bore paste,,I really think it helps,,as most guys here would likely agree.