Brand new to reloading. I was reloading 38 special with Remmington 125g SJHP bullets. Seated the bullet to the cannelure and all looked good. I had a box of factory Remmington UMC 38 Special +P 125g SJHP so I naturally compared the two - to my surprise, the factory cartridge was much longer, with an OAL of 1.542. The cartridge I produced had an OAL of 1.454. The factory cartridge was also crimped at the cannelure. I was expecting the the two cartridges to the same length since both used the same weight bullet and both bullets were from Remmington. Is this common? Note: both cases were/are the same length. Thanks.