ScottW

450/400 is a great calibre and a good starter for a 1st DR.
The other would be 9.3 x 74R.

Re colour case hardening - I personally don't think CCH
looks good on Heavy Engraved guns - they end up looking like
Spanish guns which can often look "cheap"

Just my HO.

Good luck with your purchase and ask away on the forum
as alot of guys here have heaps of experience they are willing
to pass on.

500 Nitro