I may have a CZ 550 SAFARI MAGNUM 375 h&h Action (NIB) and a 404 barrel un threaded NEW unchambered if you want to get one built.
Krish.
Hi duckfish,
The idea that Krish describes is very doable, if you can deliver your project components to a professional Gunsmith-Rifle Builder and wait awhile until it is completed.
Yours truly did exactly that for my .458 Lott,
pictured below.
First I bought a used CZ 550 Magnum rifle, in caliber .375 H&H.
Then, I hired a Rifle Builder-Gunsmith (Jim Kobe, in Minnesota) to rebarrel and re-work it into a very fast handling, large bore rifle.
When completed and I received it up here in Alaska, it was still a little bit persnickety while cycling it with live rounds.
And so, I had local Gunsmith, Andy Hawk slick it up.
It is now very smooth feeding, reliable, etc.
I like this rifle very much, even though the most dangerous animals that I have shot with it have so far, all been made of paper,stapled to cardboard.