1886 magazine tube difficulty

[Horace Patootie, SASS #35798]

I have an 1886 Winchester which was made in 1887 according to my letter. Not really a collector as at some point it was reblued. I was shooting it after one of our matches recently and noticed that recoil had allowed the mag tube to come forward.  I did not previously know that the mag cap has a piece that goes into a groove in the underside of the barrel, instead of a screw that goes through the mag cap and into the barrel.  Also, I recently watched a video from Cinnabar Ranch on youtube of shooting an antique 1886 in 40-82.  He had the same thing happen on his gun.  I reassembled mine but don't know if it will stay that way.  Could possibly be in part the mag tube hanger but I don't know that.  Apparently, this can be a thing with 1886 Winchesters. What say the wire, for those of you in the know ?

 

Horace