I thought about building one but went with a 450 Bushmaster instead, 24" 22 twist it should be done this week
I don't have any experience with the .452 ftx bullets yet but I have taken a couple of deer with the 325gr 458 FTX in my 45-70 around 2100fps very devasting turned the chest cavity into Jello and dropped a nice 8 point with a broadside shot no exit, and a couple of does same thing