Boyd Allen
Active member
Sailhertoo,
I suppose that you could send the case. I have simply measured and specified, filling in a blank reamer print form. Where I have sent something, it was a dummy round, to get the throat length matched to a particular bullet and a particular seating depth. This is easier to do with an optical comparator than with my simple tools.
The clearance will depend on the application. By the time that you cut and polish the chamber, it will be a bit larger than the print. For a small case, in a single shot target application, I would run the tightest. Graduating up to larger cases and magazine feed, in a field application, I would use more clearance, and for semiautomatic, I would have to do some research. I don't know what the minimum clearances are for reliable function.
I suppose that you could send the case. I have simply measured and specified, filling in a blank reamer print form. Where I have sent something, it was a dummy round, to get the throat length matched to a particular bullet and a particular seating depth. This is easier to do with an optical comparator than with my simple tools.
The clearance will depend on the application. By the time that you cut and polish the chamber, it will be a bit larger than the print. For a small case, in a single shot target application, I would run the tightest. Graduating up to larger cases and magazine feed, in a field application, I would use more clearance, and for semiautomatic, I would have to do some research. I don't know what the minimum clearances are for reliable function.