This is the only magazine I know of http://www.sharpshootersupply.com/Magazines.html

I believe that Wideners has the 75gr bullets for sale in bulk http://wideners.com/itemdetail.cfm?i...|281|1081|1159
$625 for 5000 = $0.08 each. Pretty good price and its in stock...

I am shooting those and they work good. If Savage had gone with a 1:8 twist it would have been an absolute winner.