I always thought the 7mm Rem. Mag was overkill for deer hunting until this year. I had an opportunity to shot at a buck that was quartering towards me and I placed the shot inside the front leg towards the brisket at 30 yards. I couldn’t believe it. There was no blood trail but he had only gone about 20 feet.

After skinning the buck I found the bullet between the hide and the meat in perfect mushroom form and in tack. I hadn’t hit any bone with this 160 grain Sierra game king bullet but still couldn’t believe that the bullet had not gone thru at such close range. After telling this to my uncle he smiled and asked if I shouldn’t get a larger gun.
So the answer to your question in my opinion is no, I don’t think it’s overkill.