Yes indeed, I certainly don't blame you, when my ophthalmologist told me that I had a floater I ask him what it looked like, his reply "looks like a piece of snot" I chuckled, then after a short pause, continued with that he had no idea what possesed him to describe it that way even though it was the best description.
My BPCR silhouette load is basically the same, 532gr Saeco 745 pushed by 72gr of 1.5f. Still a pussy cat, ok maybe a bit more, when I get bored with the 45-70, the 50-90 gets the nod with a 650gr slug escorted on it's way by 96gr of 1f. That might explain why I ask the same question when I am behind my wife's 40-65. Some men buy a Harley when they turn 50, or a little zoom zoom sports car, maybe some eye candy half his age, I opted for something that matched my age. Oddly enough most of my better scores have been shot with it.