cheap ammo?

I bought myself a new gun, and don’t really need 100 grain rounds to shoot close range targets. my gun is a .243 and I have been finding ammo for $15-16 a box, anyone know of a place to get small grain or just cheaper?

wal-mart $15
K-mart - nothing
dicks - $16

thanks for any help

Online and bulk, but you generally need to buy like 1000 rounds

try

auctionarms.com