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rodwhaincamo · July 7, 2019, 11:05 AM

A couple of questions:

First of all, I clicked on the link but the info was vague. What are the adjustment increments?

My Pietta chambers were reamed to .449” by another, but with a .452” groove diameter I’d like to get a bit closer. However the walls are rather thin between the chambers, and I use a fairly heavy charge (weighed 33 grns of 3F Olde Eynsford or Triple 7 - both a more energetic powder) behind a bullet giving more friction/pressure than a ball. So I figured reaming to just before the bolt notches should be safe. Can these accurately be set to go to a specific depth?

How is it ensured that it reams straight?

July 7, 2019, 11:05 AM	#9
rodwhaincamo Senior Member Join Date: July 7, 2009 Location: Texas Posts: 1,246	A couple of questions: First of all, I clicked on the link but the info was vague. What are the adjustment increments? My Pietta chambers were reamed to .449” by another, but with a .452” groove diameter I’d like to get a bit closer. However the walls are rather thin between the chambers, and I use a fairly heavy charge (weighed 33 grns of 3F Olde Eynsford or Triple 7 - both a more energetic powder) behind a bullet giving more friction/pressure than a ball. So I figured reaming to just before the bolt notches should be safe. Can these accurately be set to go to a specific depth? How is it ensured that it reams straight?