hi i need to know what i can use for spent 50.cal shells
or does anyone know where i can buy some because i need 50-100 lmk fatlip229 out

Mission Models makes some tiny Brass (I think) .50 cal shells, both spent and non spent.

They are pricey though.

Something else you could do is make your own. Basically stretched sprue, cut to length, and then paint with brass colored paint.

One way is pricey, the other cheap, but time consuming.

The cheapest way would be to stretch some sprue and cut. If you are willing to fork out some serious cash then http://www.missionmodels.com/index2.htm sells both spent and unspent linked .50 cal bullets. At $16 for 25 it will cost a small mint

I guess it comes down to how picky you are. The Mission Models spent casings have the appropriate narrower neck and the proper rim at the base. You might get the base with sprue by heating it and flattening it, but you will not likely get hte taper at the business end. The next best thing would be to get a DML set with plasic ammo belts and cut off hte bu;;ets and trim down the remaining casings.
So it comes to this:
Free=time consuming with a compromise on accuracy.
Cheap=more time consuming with a lesser compromise on accuracy.
Expensive=minimal time and high degree of accuracy.

Somewhere I read to go to a hardware store where keys are made, that you can get a handful of the shavings, and many are curled into tubes.

Haven't done so yet.

I never needed to have hundreds of them but when I need 10 or so I do them out syringe needles. I cut them at the right lenght with a knife (just rolling it back and forward while pressed on the needle, theni put the needle bits in my dremel at low speed and with a file I narrow the neck, then I finish the bottom with plasticard or copper/brass discs cut out with a punch and die set (or the back of a drill bit).
Next time I need some I will do andother "for dummies" guide about how to make them.
Ciao