new to site dose anybody have a good starting point for solving my problem. my S&W model 36 is not rotating every time i shot 50 rounds and the guns cylinder did not rotate three times. would take any help i can get

Most likely dirt or debris in the hand slot, and/or excessive end shake on the cylinder or yoke. Dirt or debris under or on the extractor can also be a problem. Have you cleaned it thoroughly?

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Ret. LE, FA Instr, S&W Armorer

What ammo are you shooting? Reloads, factory, +p ? I'm asking cause a bullet could be backing out of a case and hanging up the cylinder.

Are you shooting DA or SA? Did you reset the trigger by releasing fully between shots ?
Try this; with the gun UNLOADED, point the muzzle down and pull the trigger five times. Did the cyl. fail to rotate ? Now point the muzzle up and do the same. If it rotates with the muzzle down, but not up, chances are you have a broken hand spring. If rotation is inconsistent, it may just need a thorough cleaning with the sideplate off.
Please let us know what you find.

Larry

Any time you load and close the cyl of a S&W revolver it's a good idea
to always rotate the cyl until the locking bolt drops into one of the
slots on the cyl.

Thanks everybody will try all the suggestions and let you know