Cci standard velocity usually under $400/5000 at any retailer.
The only one I can think of is SK Magazine. CGN sponsor Tesro has these in 500 package for $64.99.
If you can picture a dial that has accuracy on one side and inexpensive on the other, set it to the middle (err on accuracy) - what is that (name a few, because rimfire) and where do I get it?
a word of advice before you purchase a bunch of ammo. The suggestions on brands are all good. Buy a box of all that your considering. Pick a calm day and bring your gun cleaning equiptment with you to wherever you shoot. Start with a clean gun and fire five groups of five rounds. Clean your gun and repeat until you've gone thru your ammo selection. You will see a trend as too which ammo ur gun likes to digest. If there are some close then repeat but switch the order in which you fired them and clean between. Pick ur winner and buy in bulk the same lot number. When you run out its back to the drawing board.
Here's the chart I mentioned last nite.
Hope this saves some time for you all.
Ed
I have two .22 rifles and have found my Sav-64 likes Fed Gold medal best, with Fed Auto-match almost as good. My Marlin-60 likes Fed Black-pak 36g Hp and CCI 36g MM (some say they're from the same factory?). I saw a Y-tube about slugging .22 barrels as manufacturers have ID variances of several thous. He had a chart of several rifles and bullets but I can't find it right now. i'm not on my main PC. I'll add that later. I tried it and found his info was accurate. The hardest part is measuring the slug lands and grooves - they're pretty small on a .22.