Hi E,
I hope this answer follows a pattern where you can make sense of what I’m trying to convey and I don’t jump around too much that I become confusing. I don’t mean to be critical of anyone but me when I say that. It is just that when we talk about the “feel” or how tight the bayonet should be on the barrel, different folks like their bayonets to fit differently. So let’s begin there.
I had already learned to hand fit/hand lap modern NM Pistol Slides to Frames, before I fit my first Pedersoli Bayonet to my old Pedersoli Brown Bess Carbine around 1975. I mention this because we fit those Pistol Slides, so they would have almost no movement up and down or side to side when together, but would easily slide off the Bare Frames when pointed towards the ground. A tiny difference of .001” or less between the dimensions, meant the difference between needing a soft dead blow mallet to barely being able to beat/drive the Slides off the Frames to another .001” larger difference and the Slides would fall off the Frames under their own weight. I mention this because it doesn’t take much difference in the Interior diameter of the Socket and the Outer diameter of the Barrel, for the Socket to freely slide correctly over the barrel.
Keeping this in mind, let’s look again at your Officer’s Fusil Measurements: Muzzle OD =.795", Lug OD = .805" and compare that to the India Made bayonet from Loyalist Arms of – “The Brutish carbine military bayonet measures approx.., front to back .812 - .825.” That should be more than enough difference in measurements to have a loose fit on your barrel, if not perhaps a bit too loose.
OK, let’s compare your Officer’s Fusil Measurements: Muzzle OD =.795", Lug OD = .805" and compare that to the India Made bayonet from Loyalist Arms of – “Our 18th century British private contract fusil bayonet from front to back measures .852 -.860 approx.” To me, that is
way too much of a difference and believe that bayonet would have to have a shim or shims soldered inside the socket, so it wouldn’t flop around on the barrel and possible fall off the barrel if you do bayonet drill. (Trust me, it gets embarrassing when practicing bayonet drill and your bayonet falls off the barrel, because it is too loose. I’ve see that from reenacting AWI, War of 1812 and UnCivil War periods.)
The next thing we have to consider is the “Reinforcing Collar” on the rear of the Socket. In the following link, it is shown in the bottom drawing of the first illustration as number 15.
http://bayonetcollectors.org/default.asp?12
The one problem with that drawing, though, is it doesn’t give you a good rear view of the Reinforcing Collar. To see the upside down “U” shaped Bridge that provides clearance for the Front Sight, go to the following link, click on it to enlarge and you can easily see it just below 3 O’clock on the rear of the Reinforcing Collar.
https://skinnerinc-res.cloudinary.com/images/v1539193377/1205899/detail.jpg
That “U” Shaped Bridge on the Reinforcing Collar provides critical Structural Support, to keep this from happening when it is not there:
http://ww.worldbayonets.com/Bayonet_Identification_Guide/Spain/b1664/b1664_2.jpg
The problem with some India Bayonets and the “U” Shaped Bridge on the Reinforcing Collar, can be the Front Sight may be too tall to go under it. Some folks suggest filing down the front sight, but I strongly advise against it. It is better to perhaps file a little more from the outer edge of the “U” notch, if you can, as long as there remains enough metal in the Bridge to remain sound. If not, then Tig/Mig welding more steel on the Reinforcing Collar around the Bridge and shaping it to fit, is the best fix.
This has taken me a while to type, so I will add Part 2 later.
Gus