My wife was always very protective of "her" squirrels that she enjoyed watching in our yard. We live on a farm with plenty of room around us. Two weeks ago her car stopped running and our SUV started throwing error codes on the dash. I found out that the squirrels had chewed wires off both of them. I still can't find the problem on her car. For a solution to the situation, yesterday she shotgunned three of them and wants me to shoot the rest of them to keep them away from her car. I have an assortment of old military rifles and an AR in 223. Any suggestions on making them good squirrel guns? 6.5 Swedish maybe as I have cast projectiles for it? 7mm Mauser? 30's? M1 carbine?