While not your target 450gr, North Fork 430gr at 2345fps will get your attention. With the relief grooves in the solid shank, North Fork bullets keep pressures down compared to traditional bullets of equal weight. These are an "improved" TB Bear Claw on my opinion. Extremely high weight retention. I've run some aggressive expansion test and NF SS are as close to perfect as I've tested. (Attached is a 450gr 0.458 that came in at 435.3gr going through a dry catalog, 2" diameter oak branch, and 3 water jugs, another dry catalog and captured on the 1st water just after)