Hello. I just found this thread because I was getting ready to cast up some 457483's. I have used this bullet, along with 457125 (512 gr.) in my original Sharps Borchardt for about 30 years. My load for the 483 is 50 gr. 4831, either original or short cut. When you hit a deer with it, it goes down. No meat loss. Accurate to 300 yds at least. I can hit my 12" 300 yd gong all day long with it off the buffalo sticks. Great bullet. You were lucky to find it.