Vintageguy
AH enthusiast
Ok, here’s a brain teaser for your consideration. I bought a pre 64 Winchester model 70 in 300 H&H a few years back with the intent of taking it to Africa. I bought factory Hornady 180 grain ammo and shot it but my best groups were 1 1/4 inches. So I began working hand loads with various bullet weights,…the usual. But still groups of about an inch were it but nothing to be too excited about. Usually when I go to the range I typically take at least two guns and most days I could get really nice groups from the others but this one just ok. So I’m confident it wasn’t me.
Then a few months ago what you see attached started becoming fairly commonplace and it is shooting groups like this with factory loads and not just my hand loads. My only theory is despite the gun being made in 1955 the bore was never broken in. There was no copper visible in the rifling and it will spin a bore brush off my cleaning rod despite it’s having a free spinning handle. The only 30 cal rifle I have that will do this. Anyway, it’s bore’s rifling shines like a penny now. I haven’t had a rifle change like this without my knowing I caused it and how but I’d be interested in hearing your theories.
Then a few months ago what you see attached started becoming fairly commonplace and it is shooting groups like this with factory loads and not just my hand loads. My only theory is despite the gun being made in 1955 the bore was never broken in. There was no copper visible in the rifling and it will spin a bore brush off my cleaning rod despite it’s having a free spinning handle. The only 30 cal rifle I have that will do this. Anyway, it’s bore’s rifling shines like a penny now. I haven’t had a rifle change like this without my knowing I caused it and how but I’d be interested in hearing your theories.
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