Many will disagree with me but I've always viewed anything >0.40 as a big bore.The 400's are not big bores.....
For me big bore and stopper are synonymous and that starts at .458 cal in tandem with proper ballisticsMany will disagree with me but I've always viewed anything >0.40 as a big bore.
I used to think my 375H&H was a big bore until I was shown the error of my ways.
The 375s I can agree with, the 40s still feel like they should be big bores.
Everything has been "scaled down" in caliber since the black powder days so the medium bores of 1900 are the new starting point of big bores today.
the 500 Jeffery needs More votesI put my tick against 500 J
Only coz the question was about big bores - which I read as large bore
That excludes ( in my OCD brain ) the medium calibres like 375, 404 j, 416 etc
I might have ticked the Lott, but it was pidgin holed with 458 Win (which once again my tiny little OCD brain couldn’t deal with)