Hey all I'm from WV where shots are almost always under 100 yards, I've been using a 30-06 with nosler ballistic tips and getting good results. My question is at this range are my bullets even expanding or using their potential or would I be better off with a 30-30 or slug shotgun?
Assuming these loads are of normal velocity, your ballistic tips are expanding and working as intended. They expand as long as impact velocity is over about 1800 ft/s or so. I'm a little surprised you haven't found chunks of them in your kills even if the bulk of the bullet exited, since the BT tends to want to come apart.
If what you are doing is working, there's really no need to change. But there are two possible reasons you might want to - for a smaller, handier gun or to reduce recoil.
I would avoid a shotgun unless required to use one by law.
For rifles, the various lever guns in .30-30s are an option although they can be pretty high recoil because the gun is so light. Pistol caliber lever guns might be a better options although if you have the occasional long shot I'd avoid them as the ballistics past 100y get pretty bad. Leverguns in small bottleneck spire point deer calibers like 250 Savage are great and give you the handiness of the .30-30 with a bit more range, but sadly are dying as the guns are no longer made.
Small light bolt rifles in 6mm, .25 , or 6.5mm calibers would be options too - .243, .257 Roberts, .260 Remington, 6.5 Creedmoor etc. They have way more reach than you need, but are popular, flexible, and come in small light guns like the Kimber 84, Savage Lightweight Hunter, Ruger Gunsite Scout, etc.