Greetings! I own a 1894CL chambered in 25-20 Win plus live on a ranch in DeWitt County. Honestly, I consider 150-yard coyote rifle and that is about it. It would do well on javelina but I personally would not use it on whitetail or feral hogs... too lightweight. Bullet selection is very limited and none are appropriate for big game no matter how small that game animal is. I designed a cast bullet for the rifle but still would not use it on a whitetail. I think the 25-20 would end up letting him down. All the work to get a shot at a deer and then not find it. If you want to start you son on deer with a levergun, I would suggest a 30-30 in a youth model. At the least an 1894C in 357 Mag?