I believe all Winchester rimfire ammo has been temporarily halted, none of the distributors I deal with have any. As to the Dynapoint, they are a very strange all lead bullet, no jacket, just a copper wash which you can scratch off with a finger nail. The bullet is larger outside the case with a reduced shank seated inside, sorta like a .22 LR but with a much longer shank back inside the case. Dynapoint was the only ammo that would not cycle my AMT pistol and it gave off a very pronounced puff of smoke with each shot. Velocity was only a bit over 1100 fps from the 6" autoloader, where as Winchester 40 gr. JHPs went well over 1400. As a reduced velocity load for small game it may be an OK idea but not enough power to cycle an auto and not very good accuracy from the upper barrel of my Savage M-24. If they don't resume production of the Dynapoint I'd not be heart broken.