RE: 12ga. or 30-30
30-30 will be the more accurate. It will down a deer. I have shot many deer with the exact set up. I have shot them form 30yrds to 150 with no problem. I use mine primarily as a brush gun. I use a 30-06 for my reach out and touch someone gun.
"Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity" Martin Luther King Jr.