Berrys Plated Bullets are best treated as cast bullets, not compared to full metal jacket , TMJ, or other jacketed bullets. Basically the Berrys products are soft lead swaged to shape and copper plated, so considerably softer than any jacketed bullet.

Differences in cartridge OAL will exist anytime one bullet is substituted for another bullet. Different nose shapes, ogives, etc, account for these variations. Your cartridge OAL will be what fits and feeds reliably from your magazines in your pistol.

Published reloading data is nothing more than guidance which, when used properly, will help you combine your desired components into ammunition that provides your desired results in your pistol.

Suggest that you start with the data you have quoted for Berrys plated bullets and work up slowly to a point that your pistol cycles reliably (feeding, ejecting, etc), and not be concerned about hot rod performance for practice ammo.