One of the best prices right now for practice/plinking ammunition is on WCC 130-gr round nose ball FMJ that you can
BUY HERE for $9.95 per box. It's probably at least 10-20 years old but would be just fine for shooting fun.
At the same web site you can get new production S&B 158-gr LSWC for around $11.95 per box (of 50).
Federal American Eagle 158-gr LRN is a very gentle round (760-fps) for casual fun. But it's around $14.50/box right now at
Able Ammo .
Federal American Eagle 130-gr FMJ is $15/box at
KY Imports. .
You can get a nice, and inexpensive, LSWC from Georgia Arms that is in their reloaded line of ammunition. I've chronographed their ammo and it's some of the best in the industry.
Their reloaded 158-gr LSWC which would mimic the Remington FBI load but not hollow point is only
$9.75/50 .
You might also look into their copper plated 158-gr lead semi-wadcutter bullet (800-fps)
HERE that comes to about $11 per box of 50.
I hope this helps as far as finding casual practice / plinking ammo.
Dave (nitesite)