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Old September 21, 2018, 12:17 PM   #12
T. O'Heir
Senior Member
 
Join Date: February 13, 2002
Location: Canada
Posts: 12,453
Case length is not measured to or at the shoulder. They're measured from the case mouth to the flat part of the case head. SAAMI Max case length for the .30-30 is 2.0395" -.020". That makes the minimum 2.0195".
SAAMI spec length from the flat of the case head to the shoulder is 1.4874" -.015. That's a MAX of 1.4874" and a minimum of 1.4724".
Full length resizing is all you need to do. Lever actions require FL resizing every time anyway.
"...Larry Willis digital headspace gauge..." That is not a headspace gauge. Like F. Guffey says, it's a dial indicator that tells you nothing you need to know. Cases do not have headspace. And the .30-30 headspaces on the rim, not EVER on the shoulder.
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