RE: deer rifle ?
While not the best round by any means. . .it will work just fine if you shoot well. Lots of folks seem to think bigger is always better. I have seen many Deer fall from rounds as small as a 22 hornet, which I do really think is to damn small, but it does drop em.
With that said though if you can and have the means get a bigger gun. The smallest I have for Deer is a .260 Rem.