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**Unclenick** · January 24, 2011, 01:02 PM

Vents on my iron molds (all 20 years old or more) were clearly put in by a horizontal mill, and are bigger than an Exacto knife scratch. They are where I got the 0.005" number from. The fly cutter marks in Lee and other aluminum mold are smaller than the grooves in the iron molds, but they are more numerous. I think that's why they work out.

January 24, 2011, 01:02 PM	#9
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,061	Vents on my iron molds (all 20 years old or more) were clearly put in by a horizontal mill, and are bigger than an Exacto knife scratch. They are where I got the 0.005" number from. The fly cutter marks in Lee and other aluminum mold are smaller than the grooves in the iron molds, but they are more numerous. I think that's why they work out. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle