I know how you feel ....except I have a 91/30 nagant. JGsales.com They have 7.62x54R on sale for $84.92 for a 440 round tin. here is the exact site.....
http://www.jgsales.com/product_info.php/am...roducts_id/1789
I dont know a cheaper place to buy it.....hope this helps.