Ok, I might be able to help here. As far as the 30-30 barrel, it sounds like you have an old style locking lug, just call T/C and explain it to them, they will send you a new set of lugs and a roll pin. For the 45/410....I had the same problem and soaked the end of the barrel in PB Blaster. After about 20 minutes I was able to remove the choke. Hope this helps.