Also, in case somebody stumbles across this in the future and has the same problem, user Valinoarms over on GlockTalk posted the below instructions that I assume Winchester did at the factory that does not require altering the barrel notch. It makes sense in regards to how the barrel band screw would commonly be bent.
"Sorry for the thread revive, but you do NOT HAVE to file away on the barrel for the Pre '64 Model 94s. Winchester didn't mess up, they just assembled the gun differently.
For anybody who is having the "bent screw" rear barrel band issue, do these steps and you will be able to get the gun back together along with tightening the screw.
1. Remove the magazine tube carefully so as not to damage the spring. This involves removing the front band screw, along with the actual tube screw that goes into the barrel a little.
2. Slide up the fore grip halfway, and start the screw in 1-2 threads, not all the way because that band has a compression effect that you cannot see visually. This has worked on quite a few pre-64 model 94s I have done that you couldn't get the screw in normally.
3. Tape the fore grip if you care enough, but take a 2x4 block of wood and gently hammer down the fore grip. This will SEAT the fore grip completely and the screw will fall into the cut groove in the barrel.
4. Gentle insert the magazine follower and spring into the hole in the foregrip, and be gentle. Slide the tube over the spring carefully, until you feel it seat all the way. Be sure to test feed some rounds to ensure you have everything lined up.
5. Line up the slots for the magazine tube and barrel, to replace the screws you removed earlier.
6. Conduct functions check, and be amazed at how impossible that task seemed until you just did it. Enjoy a nice beverage."