Hoke, I have no idea about the rate of twist. I have searched factory catalogs from 1937 to 1965 when these guns were discontinued. I have found no information about rate of twist or mention of anything other than full choke. I would suggest looking at reloading data from this era. It is possible that you may find mention of certain bullets being more stable in a .30-30 because the rate of twist is?
?? and the article may state a standard rate of twist. As to your friends combination gun...check the assembly numbers under the barrels in front of the barrel lugs, the assembly number stamped inside the top left rail of the receiver, and stamped into the wood under the butt plate. If they don't match, then the gun did not leave the factory as a genuine "Utility" gun. That is, one receiver, rifle barrel with fitted forearm and shotgun barrel with fitted forearm. Also, these numbers may or may not be stamped inside the two forearms. If the numbers match,depending on the condition of the gun, if excellent, I would say 300 to 400. The numbers will be something like "X" over "1B" or "C" over "XY". It may be hard to understand, but these numbers and letters vary. After you look at a lot of them, you will recognize the pattern. If you have time, email them to me and I will try to help you decide. Prices have gone up a lot in the past few years. $150 would not get a very nice standard .30-30. The gun you describe with the curved steel guard is what I refer to as a First Model Utica gun, and generally the best of the lot. But remember to check for re-blue and alterations to metal or wood. This will greatly affect the price. I hope this helps some.
