What is this stuff?

[Johnny Peppers]

The Winchester Dyna Points are not hyper velocity like the CCI Stingers. Velocity of the Winchester is around 1150 where the Stinger is around 1650.

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[jsiberians]

I still can't find dynapoints so today I ran 100 rounds of the winchester 555 22lr from Walmart. Some stores sell them as 336, 222,etc the number denotes the quantity in the bulk box. They are 22lr 37gr hp 1250fps.
They actually cycled my 21a bobcat 22lr better than the dynapoints. No firing problems and shot fairly clean.
I will continue to use cci Stingers for SD but the 555 will be my new practice ammo.