FWIW the Speer Gold Dots work great in mine, but the Hornady CD have a terrible failure-to-fire rate in it. Dunno why, others have no problem with the stuff.
Good luck finding Silvertips. I had an order for some through Cabelas for 4 months which they finally cancelled.
For target practice, the Winchester white box FMJ 115gr works well, is generally available, and is WAY cheaper than the premium JHP stuff.