No.1 Mk.III inner band.

[Bruce_in_Oz]

Not only is the inner band on Mklll and lll* rifles tapered, the hole is not actually round.

There are two little "flat" section in the upper half. These are aligned at 60 degrees to the horizontal. Good filing exercise for the apprentices!

I guess that this provided some sort of guided, centralising bearing, of a similar nature to the little extra window cut above the muzzle exit on the nose-cap.

On the road again: When I get home tomorrow I will see if I can kick the scanner into life and post the actual drawing.

Must also have a closer look at the small box of inner bands again!

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.

[Ridolpho]

There are two little "flat" section in the upper half. These are aligned at 60 degrees to the horizontal

Bruce in OZ: I had noticed that in my spares and you'll often see the wear marks on the barrel from where the barrel rests on these flats. I have one MkIII (1916) made by Enfield from a former MkI that shows wear marks about one inch apart due to the relocation of the inner band in the new model. The little flats certainly seem a good way to positively relocate the barrel after each shot and I've extrapolated this to the front bearing on a couple of No. 4's that were not grouping well. While they had good up-pressure, the barrel channel was of a larger radius than the barrel and didn't positively relocate it after each shot. I scraped a smaller radius groove at the bottom of the channel (inverted analogue of these inner bands) and now the barrel is very positively located. In one case the grouping clearly improved.

Ridolpho