This was a straight pull bolt action .303 rifle issued to the Canadian military starting in 1903. It had some problems. See the link below for an article on the Ross.
Ross rifle was created in 1903.
Canada
In the age of the Internet a simple search with terms like "Ross Rifle" or "Ross Rifle parts" will turn up various dealers. Including your address, if you are into bricks and mortar stores to shop at will find local dealers.
ross rifle
Sir Charles Henry Augustus Frederick Lockhart Ross
Ask a gunsmith for help.
bro
Sam Hughes supported the Ross Rifle, which turned out to be faulty when used in WW1. Hughes was at the time Minister of Militia.
The Ross Rifle was used by Canadians in world war one. WW1 was mainly trench warfare and were not good conditions for the Ross rifle it would jam fairly easily and Canadian soldiers were forced to pick up dead Germans guns the Lee-Enfield
it was a good idea at the time
You take it to a gunsmith.
The Ross Rifle, I believe. It turned out to be faulty.