Most Consistent 30-30 Winchester brass.

[pondskipper]

Decades ago I loaded for a friends bolt action 30-30, a Western Auto (Savage 340). It shot a group like that at 100. IIRC I was using Win brass and W-748 powder. Dont recall the bullet but that rifle shot amazing. Until then I didn't think a 30-30 could do it.
Gorgeous rifle!! and great shooting.

Got me to thinking, he also has an original Marlin 1884 or 6, cant remember. It was a 38-56 Win. I cast bullets for it and made the brass from RCBS 45 basic brass

Yep, funny enough getting it to do that was a two part ordeal because it's not a modern rifle design by any means and the barrel being what the gun rests on being the biggest part of that, I had to move it forward and backwards in the rest to find where it shot the best group overall kinda like a guitar string against the frets on a guitar neck, it changed "tone" or frequency depending on where along the barrel it was resting but now that I know where that is it's extremely repeatable and I actually slightly pulled one of those shots on that target so I'm pretty sure it will do even better than that, two of them went .062 and the last put it at .142 even with me pulling one, either way it should be WELL below .5" at 100yds and completely capable of staying well inside the 10" X ring at 1000 if I do my part.