How is a chamber cut?
We use precision ground cutting tools known as Chamber Reamers . They are a hardened, ground reamer that is cut to exactly cartridge size. Imagine a reamer that is the exact shape of a 30-06 case and you’ll just about have it. We chuck the barrel up in a lathe making certain that it’s running true (that it doesn’t wobble) and we slowly run this reamer into the barrel. We use a precision ground gauge to check for headspace. We also have special reamers to modify the throat and neck of a chamber to what ever a customer specifies. After we’ve cut the chamber with a reamer we use a series of abrasive papers to polish the chamber smooth. If it’s done correctly, you now have a chamber that is exactly reamer size and runs perfectly concentric with the outside of the barrel.
