If you look in the section that says "load development and shooting", you will see that the 455 is loaded to 13000 psi, while factory 45 AR is loaded to 17,400 and factory 45 ACP is loaded to 18,850, with SAAMI allowing 21,000 psi for standard ball ammo.
That is one HELLUVA difference.
Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.