Not sure what distance you want to shoot and how heavy those silhouettes are, but the Anschütz 8002(-S2) is a .177 caliber 10-meter match rifle that has a muzzle energy of just over 5 ft/lbs. You can modify them to go up to 12 ft/lbs, but still quite the expensive tool for silhouette shooting in my humble opinion. To answer your question, overkill indeed.