Boring tapered hole

[Peacons]

How best to bore a tapered hole in steel?
Trying to match the taper of a civil war cartridge (Burnside) in the breech block.
Lathe plus boring bar or ...?

 

[Superburban]

If it fits, the lathe would be my first choice.

 

[mmcmdl]

Lathe plus boring bar or ...?

Chamber reamer ? Just realized this may be a biggin .

 

[T Bredehoft]

Best bet. Lathe with taper attachment.
Next, Correct angle reamer.
Third best bet, boring bar and crank the compound a the right angle. (not reliable, as you crank the compound you lean in, pull back as the handle goes around. )

 

[Illinoyance]

D bit ground tothe proper profile.

 

[Peacons]

D bit as in reamer or drill?
If reamer i presume you'd step drill out most of the waste before reaming?

 

[Silverbullet]

It's a short taper so 4jaw on lathe , compound set to matching angle then bore to fit , polishing is called for on this too. Multi grits to 320 minimum .

 

[Peacons]

Would need a very small boring bar to reach the small end of the taper.
Here are a couple of photos of the cartridge. I have just the cartridge, no bullet.

 

[pontiac428]

Now that's an odd one. Whazzit, Morse #2? Do you have problems with the propellant cooking off when using it as a dead center?

 

[Peacons]

Now that you mention morse #2, a reamer for that taper was my first thought to create the cavity. Though I think the morse would be a bit too long.
Have to make some measurements.
No cooking allowed either