Yeah, ya gotta have Silvertips. Since they don't make them anymore, I look for them at the gun shows. I will buy them if the price is within my sense of reasonable and pass if they aren't. I have bought some 30-30 ammo that was not only old, but quite deteriorated, just because it was Silvertip ammo. I disassembled the bad stuff, oftentimes salvaging only the bullets which clean up fine in a vibratory case tumbler. Then I rebuild it into new ammo with correctly head-stamped cases that match the vintage as closely as possible. I examine the old powder charges and weigh them before throwing it out. Here's what I have found: The Silvertips with aluminum tips from the yellow boxes typical of the 1970's contained a ball-powder with the appearance and a charge weight consistent for Winchester 760 in the 170 grain version that I dismantled. I was somewhat surprised that it could not have been W-748, as it would have been an overcharge if it were. Now the older 170 grain Silvertips with the nickel-silver tips from the Grizzly Bear box, contained an extruded propellant charge that resembled IMR-4895 or something similar.