Re: 30-06 or 243 deer?
More energy isnt everything. A bullet that hits harder but misses is useless compared to a bullet that hits softer and hits it mark.
What i mean is, the OP is more practiced with the .243, so natually his chances of a clean hit are greater with it..
It takes 43 muscles to frown, 17 to smile, and 3 for proper trigger squeeze.
The latest caliber or gear is no substitute for experience and skill. Rifles and cartridges don't make hits -- shooters do.
Fact of life:
After Monday and Tuesday, even the calendar says WTF!