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Old September 3, 2018, 07:46 PM   #15
std7mag
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Join Date: June 23, 2013
Location: Central Taxylvania..
Posts: 3,609
Take a fired case, crimp with pliers, or collet sizer till bullet is held snugly. Just beyond finger tight.
Insert bullet, leaving it long.
Chamber.
Do NOT pull the trigger!
Carefully remove. Measure with a good set of calipers.
Do this at least 3 times.
Measure from base, to bullet tip. ( i know it can be off by about 0.005").
This measurement is your cartridge over all length to the lands for that particular make/model/weight bullet.
Typically you would subtract 0.020" for your loaded COAL.

Not it can be longer than SAAMI or CIP length. As long as it's seated fully in the case neck.
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"Januarary 6th insurrection".
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