TIL: when shipping brass, bullets or lead, 6 USPS small flat rate shipping boxes fit perfectly in one medium flat rate box. Great reinforcement. : r/reloading
USPS What a difference a few years makes. Check it out. | Rock Tumbling Hobby
Priority Small Flat Rate Box Sale Online, 50% OFF | edetaria.com
Priority Mail Flat Rate® Medium Box - 1 | USPS.com