A .270 will do anything you want it to do, within reason. ELK at 600 yards ..... NO ! But deer out to 350 or 400 yards yes..... Elk to 250 to 300 yards.... sure..... It is a very accurate round, and the recoil is not punishing.
I believe you made a fine choice, and yes, it is different from bow hunting , but it is still exciting in it's own right. The hardest thing to get used to, in their differences, is that the deer doesn't have to be close enough to be able to spit on it to kill it. ANd you also have to learn to judge you deer ( quality ) at a distance through a scope. But man..... the power is incredible.
Good Luck.