With regular ammo, consider a 234 Win or 7mm-08. Reduced Recoil Ammo will also work for deer: 270 / 308 Win, or 30-06.
Conversely, in training my wife and sons, I used a 30-06 with Reduced Recoil loads at the range and substituted the real stuff in the field. (They'll never know the difference with their heart pumping and a deer in the sights.)
Every year my Pro-Staff and I head to the woods to hunt the old wise Tom. We travel thousands of miles covering numerous states hunting these old guys. Lots of times we end up hunting public lands or private property that have been hunted already. That’s the last thing you want to hear when you just traveled 6 hours that someone else has already hunted the property. We had to come up with a game plan and one real fast.
The first thing we did was ask the farmer were they usually see the birds in...