Those cutter angles are included angles. Once upon a time, the factory angles were in the 14-18 degree area.
If you're going to hack away yourself, the forcing cone shouldn't be more than 0.020 inches over groove diameter. Assuming a good quality revolver.
The qualifier is there because I learned why an H&R had such a large forcing cone from the factory. Barrel/cylinder alignment was .......casual.
Last edited by WR Moore; 03-26-2012 at 10:27 AM.
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