Ross M10 markings

[Terdfergus]

Upon further inspection, I found this stamp on the front of the bolt handle, looks to me like it says "DG5"
https://i.imgur.com/WJfCZlm.jpg?1

I also noticed what may be the remains of a number on the left side of the stock, or maybe I'm just going nuts and seeing things in the wood grain...
Here are some images from various different angles and lighting. Depending on the angle it kind of looks like it says "373" or "375" and there is something that sort of looks like an "X" in front of it
https://i.imgur.com/4N7mTLB.jpg
https://i.imgur.com/VPuoTTG.jpg
https://i.imgur.com/CfHu92w.jpg
https://i.imgur.com/ogJNfis.jpg
https://i.imgur.com/gJneo7f.jpg

There also looks to be the remains of a "7" on the right sight of the stock
https://i.imgur.com/a0tuOtS.jpg

[Surpmil]

Nothing to be concluded from that I'm afraid. Could be a "rack number" added in British service or who knows what.

The Canadian army/ordnance only marked on the right (bolt knob) side of the stocks. Some Home Guard rifles were marked on the left side IIRC, but this isn't one of those.

The bolts often take a bit of a jerk to get started on opening, compared to a regular turn bolt anyway. You could use a fine compound and lap the bolt lugs and breech lugs into each other if you wanted to. I suspect this was what makes the commercial rifles built on the 1910 action noticeably smoother than many MkIII rifles (the military version of the M1910 action)