There are several models of Ross rifles, just as there are several models of Winchesters.  The Model 1905 was the basis for the Canadian military rifle.  In original form, it was very accurate.  But it fared poorly in the trenches.  It could not be fired if incorrectly assembled.  The Canadians greatly enlarged the chambers of their military rifles, greatly reducing their accuracy.  But the mud of the trenches won.  The Ross stayed in service with the Royal Canadian Navy (in the original form) for years, even through WW2.  Not much mud in ships or at naval stations.

In "The Rifle in America", Phil Sharpe wrote about the much-modified military 1905 Ross then (1937) available as Great War surplus.  He wrote that they were safe, but that you could not reliably hit a flock of barns with one.

The Model 1910 is the model that can be incorrectly assembled and will still fire.  About 15 or 20 years back, I came home with a beautiful 1910 sporter in 280 Ross.  My youngest son, a mechanical engineer, spent most of a Saturday taking the rifle apart and putting it back together, measuring things and taking notes.  He returned the rifle to me, saying "please don't ever shoot it, Dad".  I was in need of funds and sold it on consignment in a local gun shop.  I have never felt very good about doing that.