I used to use 180 grn Winchester Silvertips in my Rem 760 .30-06, but changed to Speer hot-core's in my own handloads, when Federal Premiums came out with Nosler Partitions, I switched to those. All performed pretty well, although the Silvertips didn't like bone too much. The Federals seemed to hit a little harder, but I almost never had any lead left in the front partition... it just blew away, leaving maybe 50% retained weight. After a buddy knocked over a nice bull with a spine shot, I was amazed to discover that his bullet was well over 80% intact, even after completely smashing the heaviest part of the spine. a perfect mushroom, except for one side had peeled off. and this from a 50 yard shot. What was this amazing wonder bullet? A 180 grn Winchester Powerpoint in a factory Super-X load...$11.95 for 20 at any Wally world.
I have now been using them exclusivly for the last 8 seasons, taking 8 moose, at ranges from 30 yards to 200 yards without a single failure. They seem to hit just as hard as the Federal Premiums, but the hold together better. The last 2 moose were taken with a .300 Win Mag with 180 grain powerpoints and they hold together just as well, even on a 75 yard neck shot. This has to be the bargain of the century! They still expand reliably on deer as well.