weight

[jp1]

No not what I weigh but what should my bullets weigh. New to shooting cast I wonder what weight is best for shooting from a single shot Contender 23 inch barrel. I was given some 150 grain gas checked bullets and am about to load them up. My brass is all accurized and ready to go. I measured the chamber length but just wonder if 150 is a good weight as some others have told me that 170 is better. Your opinions are wanted.

[1Shirt]

Sounds like you are talking 30-30 or a variation of same as you did not say what ctg. If it is a 30-30, either will do fine, and if I had a preferance it would be for the 150.
1Shirt!

[runfiverun]

weight is not important.
the nose and body diameter are.

[Jeffrey]

Depends on what you are shooting... cartridge, target, varmint, small, medium, large game, velocity, twist rate... We need a LOT more information to give an informed answer.
LOTS of great guys here with a wealth of information.
Jeffrey