I have simply chucked up my #45 into my drill press and go to town drilling out the holes. The #45 is .082" diameter and about 33% of the brass touches nothing going through. The other 66% takes off varying levels of carbon and brass. I'm going to drill out some holes using the .086 #44 and see if there are any pressure signs. I did find one entry in a google search that said the holes should be 2 millimetres large. That is .0787" diameter.

I can only tell you once I started this, the holes vary in size and there seems to be no consistency between different brass makers. Some are much larger than 2 mm and many are smaller. This can't help accuracy.

kwg

For liberals and anarchists, power and control is opium, selling envy is the fastest and easiest way to get it. TRR. American conservative. Never trust a white liberal. Malcom X Current NRA member.