My son finally is old enough to go deer hunting this year. We have been to the range a number of times over the past few years. He really enjoys firing the .22. The problem I am having is he is really uncomfortable shooting my 7mm mag. I do not want him to develop any kind of a flinch from having to use that rifle. My plans are to get a new (or good used) rifle of a smaller caliber for him to use. Right now I am looking at a .243, but a local shop has a used .270 for a good price. Do you experts out there have any suggestions for me?