I would think that it would be extremely difficult to aim and shoot a 1910 Ross Rifle, equipped with the standard Warner & Swayze telescope, from the left shoulder. The eyepiece of the telescope does not sit anywhere NEAR the bore of the rifle; it is WELL off to the left side. It was a good arrangement when it was designed, but it was designed more than a century ago.
The original telescopes for this rifle are anything but common, as they also were used on some of the US Spingfield Model of 1903 rifles. In
Canadian
Service, there were only 500 telescopes purchased, of which 250 were fitted to rifles in 1915, the rest in 1917. Scopes were numbered to the rifles, 1 through 500.
If you click on where it says
Knowledge Library
(top left as the Site comes onto the screen) you will be taken to the Military Knowledge Library, which is essentially a treasure-house of books, manuals, articles and photographs. Every month has a particular firearm "starring" and the "star" for this month is Number 223 of that first 250 Ross Snipers. What you will be looking at is a photographic 'tour' of the rifle, every detail you could ask for. You'll see immediately the problems with the W&S scope.
But despair not! for Rosses were scoped with many different kinds of telescope, even during the Great War itself. Alex Martin of Glasgow (Ross Rifle agents, by the way) even made mounts to adapt the Mark III rifle to the Aldis telescope, which would have been my own personal choice had I been there rather than my grandfather. He was a battalion-level sniper with 54 Battalion, CEF and carried a Ross until the War ended.
Something not generally realised is that ANY telescope-mounted rifle was a curiosity at that time. MUCH sniping was done with Rosses with the factory iron sights, also a great deal with "stripped" rifles: what we now would call Bubba sporters with the wood removed from the middle band forward. But they are very accurate rifles, quite enough that if the rifle is shooting well and the ammo is up to snuff and you can hold the rifle, you can hit pretty much whatever you see. My own Mark III has shot third-of-a-minute callsed groups enough times that folks no longer call me a liar to my face (I think they wait until my back is turned!), although I am not handicapping the rifle with 65-year-old ammunition.
Rosses are fun. Take a look at the 'tour' of that beautiful rifle in the
MKL
; that will answer your question better than I can. And be sure to download some of the articles on the Ross. There ARE important safety issues to know about, specially with the Mark III (1910) rifle.
Enjoy! And welcome aboard.
.