I have slugged my S&W K38 barrel but don't know how to measure it groove to groove because it has an uneven number of grooves, 5. My micrometer measures land to groove which is not full diameter. How do you do it?
Lifetime NRA since 1956, NRA Benefactor, USN Member, CBA Member
Attached Files
The drawing shows the proper way machinist's way to do it.
The simple “quick and dirty” way is to wrap the slug with one full revolution of Bond paper, measure over the wrap, and then subtract twice the thickness of the paper. Close enough.
73 de KE4SKY In Home Mix We Trust From the Home of Ed's Red in "Almost Heaven" West Virginia
Attached Files
Aaron
20
jeff houck
20
Tom Acheson
15
Wilderness
14
John Carlson
13
sghart3578
10
MarkinEllensburg
9
Spindrift
5
alphabrass
5
SkinnerD
5
