What you DO need is enough ammo to practice a fair amount (and develop an idea of elevation dope at ranges from 5-60 yards or so), and you need the chosen ammo to be PRECISE in your rifle.
I use CCI SV when hunting raccoons (If I'm not using my .17HMR or .410).
Accuracy and shot placement are more important than the bullet type IMHO. As stated earlier, round testing to see what works best in your specific rifle is key. Granted, you really only need it to be MOS (minute of squirrel). You just want to make sure you aren't using something your rifle really hates and are getting 5-10 inch groups at 25 yards with or something crazy like that.
CCI Velocitor. Excellent terminal performance and above average speed to keep it a little flatter.
Concur, although, honestly, I stick with "Standard Velocity" ~1,050-1,100 fps ammo. It usually shoots better-er than anything faster, and it for SURE shoots better past 50 yards or so.
On my list would be:
CCI Standard Velocity
Federal 40gr Gold Medal
Eley Target (yellow box)
SK Standard Plus or SK Rifle Match
ONE of those will shoot.
But the caveat is that if you elect to start taking chest shots, the LRN bullets I suggest are going to punch little holes...not that most "HP" designs do much.
I use CCI SV when hunting raccoons (If I'm not using my .17HMR or .410).
Accuracy and shot placement are more important than the bullet type IMHO. As stated earlier, round testing to see what works best in your specific rifle is key. Granted, you really only need it to be MOSE (minute of squirrel eye). You just want to make sure you aren't using something your rifle really hates and are getting 5-10 inch groups at 25 yards with or something crazy like that.