Daisy Match Grade Avanti Precision Ground Shot BBs, 1050 ct

Extremely accurate used in the Daisy 499, but I wouldn't bother in lesser BB guns. My own testing indicates it makes virtually no difference in typical BB gun barrels.

Pros
Used in the 499 you can depend on accurate results, good enough to fine-tune just about anybody's shooting. An excellent bargain for the discriminating BB shooter.

Cons
Occasionally one will be a bit too small to fire correctly (have not seen one too large). The good news is you'll be able to tell when you load it in a 499 because it will drop way too fast. I keep a can handy to pop with those so I don't mess up the shot pattern. This is pretty rare, maybe 1/50 BBs.

I have shot these in four different 1911 style pistols, a Daisy 499, and a Morph3x. They loaded easily, were very consistent in quality and were very accurate. The Daisy loved them. One jagged hole with ten shots off a rest at 15 feet. They are pricey, but good stuff costs money.

Pros
None better in my limited experience. Clean, consistent, dependable. If they are off its you or the gun.

Cons
Cost might be a factor. Hard to distinguish from Daisy Premiums.