If this is interesting, I kept some images from a Rem gel shoot event a few years ago ...
For the purpose of this thread topic, these are just the Golden Sabre BJHP and Bonded rounds (not everything else).
Rem standard 180 gr BJHP (non-bonded) .40 fired through 4-layers of denim into a gel block (P229 used). Seemed to do okay.
At the end of the day for that gel event, the rep fired 5 rapid shots into a gel block, achieving 5 nicely expanded bullets that penetrated just about within 2-3 inches of each other. Not bad, I'd think.
Now, here's a
bonded Rem 180gr .40 BJHP bullet that was fired into the same denim barrier/gel conditions. A little different expansion for that shot using the bonded bullet.
Here's the standard non-bonded round fired through auto windshield type glass into gel.
And here's the bonded bullet fired through glass into gel.
While nobody offers a guarantee for expansion, penetration and overall "performance" when it comes to defensive loads, when I use Rem Golden Sabre BJHP ammo, I'm satisfied using the standard non-bonded loads such as the 124gr +P 9mm, 180gr .40, 230gr .45 ACP, & 125gr .38 +P. Not so much the 165gr .40 loads.
It's not the only type of defensive ammo I use and carry, though, nor do I consider it to necessarily be "the best". (I also use Win T-series, Speer GDHP and occasionally even some other old-style hollowpoint loads, depending on availability.)
I use the Rem BJHP when it's on hand (issued), and focus more attention on whether it actually feeds & functions in
my guns, and definitely more thought to
my skillset and weapon maintenance practices.
FWIW, the Rem rep explained during the event that Rem "bonds" their BJHP bullets by putting flux compound inside the brass jacket before the lead ingot (core) is inserted and the bullet's production completed. he said they also make subtle changes to the nose cavity/hollowpoint shape which are intended to prevent the the jacket from expanding too rapidly, and that these design changes vary according to caliber & bullet weight.