Winchester lists the ballistics of the ammunition it sells.
see below
Winchester, Ruger, Savage to name a few.
Remington, Ruger, Winchester, Henry, H&R to name a few
Winchester 150 grain 30-30.
The Winchester Magnum Rimfire is a larger round, and is capable of producing twice as much energy as the .22lr. I do believe that Ruger is making a rifle capable of handling the .22WMR, but a standard .22lr rifle is incapable of safely firing the .22WMR.
Between 275-550 dollars,depending on overall condition and a good bore.
No air, no resistance
I'm not familiar with a "Winchester model 77". Is this a bolt action gun or a lever-action rifle? Winchester's famous bolt-action hunting rifle is called the Model 70. Their most famous lever-action guns are the 1873 and 1894 models. Ruger is a company that has a bolt-action rifle called the Model 77.
Winchester, Browning, Ruger, Savage- really, any 1st class gun maker- but those 4 are my personal favorites.
The 204 Ruger is actually a rifle cartridge, therefore does not come with any accessories. It is primarily intended for use with Ruger's Varmint rifle.
The ruger rifle
You will have to call Ruger to find out.