There are a number of ways to bore chokes , we all have our preferred methods and those of us who do it have built up a collection of tooling over our lifetimes .
There is no one tool or reamer and most people who do choke work will use a degree of honing to get a specific size and to finish .
I bore chokes with specially made long shafted and piloted reamers from breech to muzzle ,taking the metal out in stages and finish hone .