Easy peasy.
Just look at the muzzle end of the bore in good light. Does it look like there are a dozen rifling grooves? That's microgroove.
If it looks like 4 or 5 grooves, that's Ballard.
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I've never owned a .45-70, but did own an older .444 that was likely MOA capable. I shot 1.5 MOA groups easily with a 2.5X scope.
Wish I still had that rifle, but the present owner wants to keep it, I think.
Thanks KC, I’ll take a look in the morning. Pretty sure it’s Ballard though.
45/70 Gov sure puts a smack down on 325 lb. Blackies. Just sayin'...........
Mine is a micro groove.
Any of you big bore guys shot 40-72 WCF ? I think it was a Winchester 1895 lever that was chambered for them.
I wound up getting some 40-60 rounds on Switzers last auction. They had them listed as 45-70 but obviously made a mistake.
Weird looking round