A mate of mine has a double 4 and a double 8.

Either way, hit a buff with one and they know it.

A person I know hit a charging buff with an 8 bore - it was charging someone else so was side on to him - and it
absolutely poleaxed it.

8 bores are more common than 4 bores by a long way
- and even more so in doubles.

H&H made a few I believe.

500 Nitro