I just tried to swap my 22-250 barrel to my 7-08. I've swapped these barrels several times in the past. Tonight the 7-08 barrel gets about 1/2 way down into the receiver then starts to get real hard to thread down then stops. The '250 will finger turn all the way in and out. The barrel nut will go on and off the 7-08 barrel with ease so I'm guessing the threads in the receiver are off a bit. Would it be better to take to the gun shop or to a machine shop to check the threads. Not sure how able gun smith is set up for this. Please advise. If its gets messed up I'm out 2 guns not one. Thx for any help or insight .