? REM EXPRESS: CORE-LOKT VS REM CORE-LOKT

General Firearms Terminal Ballistic Information
1

I have both and they are labeled as follows:

EXPRESS CORE-LOKT
338 WIN MAG
225 GR. CORE-LOKT PSP R338W1

CORE-LOKT
338 WIN MAG
225 GR. CORE-LOKT PSP R338W1

What is the difference?

2

Different boxes? Remington makes a PSP and bonded PSP in that weight and caliber. If neither one is bonded then they are going to be the same bullet. Other than that you are looking at your standard lot to lot variations.