I was reading some gun magazines and then i started to think about one thing.
How about making a sabot that takes a .620 bullet (.600 NE bullet) in a shot gun?
Is it possible?
What veclocity is possible if you make a sabot like that to a shotgun with a 12/89 caliber?? I know that the 12/89 caliber take a shot load of over 1000grains.

This could be a "poor mans .600 OK"
Hubel and rob! Please tell me.

You do realize that a 0.620" diameter bullet is a 20 gauge shotgun don't you? You could try and find a heavy walled 20 gauge barrel and screw that into a 12 gauge Savage bolt action and use a bottle necked case design. Keep the pressure down to 14000 psi (don't know what the barrel can take) and it should be a fun cannon, I should think.

ASS_CLOWN

In the single shot rifle forum there is a thread about a 20ga on a H&R single shot. His barrel slugs at .624. I think he is still waiting on custom brass cases before shooting it. I'd like to know what H&R makes there slug barrels out of to get an extimate on safe pressures for it.

Or maybe just paper patch the .620 slugs in a brass case?

He shot it today with factory ammo to sight in.

What is 12/89? Is that 12 gauge 89mm length? Brenneke makes a "KO sabot" round that puts the 20 gauge KO slug in a sabot that lookes like a heavy wad. My Winchester AA wads won't do this, so I suppose it is a special wad though I have not looked at steel shot wads which I hear are thicker. If you wish to follow the NEF experiment, that discussion is on Single Shot Rifles. There was a thought about doing it on a 12 gauge Ultra Slug Hunter.