This is the stuff I bought from SOG. $.95/box of 14 rounds, but they also say $4.74 per box when ordering 78 in a sealed can.
Just don't shoot the Nagant enough to buy a that much, and I don't know how well it shoots. When I get a chance to shoot some i might order another couple hundred rounds.
Something to note from my previous post.
One thing I noticed is that it doesn't have the gas seal "flair,but rather a long taper over the bullet with two "peen" marks opposite each other at what appears to be the bullet base.