A little slower to use than a lever action, but it will kill deer just as dead as any other .30/30. If you are talking about the model 340, the only thing I have against them is that they are butt ugly! However, the proof of the pudding is in the eating, and the first two deer I ever saw shot were taken with a 340 in 30/30; both were one shot kills and one was on a dead run.
As 2poppa said: practice.........

Enjoy the gun!