How do you rifle a cannon?

[Cpl. Smith]

Is it done the same way as a hunting rifle just bigger. Are the groves cast? Thank y'all in advance!

 

[redbob]

A boring bar is used, which is like a large tap.

 

[UCVRelics]

No the groves were machined with a lathe such as these.

 

[Cpl. Smith]

No the groves were machined with a lathe such as these.

View attachment 187744 View attachment 187745

That is what I would call heavy machinery. Wow!
I imagine this is a fairly slow process.

 

[UCVRelics]

Here is one from The Confederate Arsenal at Selma Alabama that was used on big naval guns and a Haper Ferry drawing on the one at the West Point Foundry.

 

[Larryh86GT]

No the groves were machined with a lathe such as these.

That's pretty amazing.