Is a 7mm-08 caliber bullet a good all around deer rifle?

It is the third most popular rifle cartridge behind the .308 and .243 Winchester. How "good" it is depends entirely upon the shooter. If you require two or more shot consistently to hit your target, a 155mm howitzer isn't going to be "good" enough. Worry less about what you are shooting and more about technique. Find a shooting coach and learn the basics.

The 7mm-08 has the punch to pass through a deer, and it has significantly less recoil than comparable ballistic .30 ammo. Any animal that receives a through and through to the heart will drop. Learn to place your shots and you could be a successful deer hunter with a .22 cal.