The number of pellets contained in the shell will depend on the size of the shot.
That depends on the size of the shot in the 3 inch shotgun shell,and the weight of the shot.
Double-aught refers to the size of the shot (or pellets) contained within the shell, each of which in this case is roughly 8.1mm (0.33") in diameter.
I do not believe that Winchester ever made a 9mm shotgun, although 9mm "snakeshot" ammo, comprised of tiny pellets and looking lot a shotgun shell exists. Do you perhaps mean 9 guage?
pellets, powder
The turkey eggs that I have are 3.1 to 3.4 oz each w/ shell The jumbo turkey egg ( double yolks) weight 4.8 oz each w/ shell
A 12-gauge shotgun shell typically contains multiple pellets, which are small, round projectiles inside the shell. The number of pellets in a 12-gauge 3" shell can vary depending on the specific type of shot being used, such as birdshot or buckshot. As a general guideline, a standard 12-gauge 3" shell with birdshot may contain around 1-1/8 to 1-1/4 ounces of shot, which can translate to roughly 200 to 300 pellets. For buckshot, there are typically fewer but larger pellets, with a 12-gauge 3" shell commonly holding around 8 to 15 pellets.
It is a shotgun shell.
an egg
expose twice the connecting energy as standard shellANS2:Double-aught or 00 buck shot has a pellet diameter of 0.33" and 8 pellets make an ounce. It is effective on big game at close range.
Winchester stopped the regular production of 20 gauge in 1963 and the 20 gauge magnum shell wasn't introduced for several years later.
No, not advisable.