Dont worry friend, the rifle probably left the factory with a #2 bolthead.
X2 I agree.
Like it or not, not all receivers are created equal and neither are barrels chambered perfectly, nor are all bolts bodies identical.
That's just life in the real world.
If someone has changed it and that's equally possible, Tradex has 0 and 1 bolt heads, so do Numrich and Sarco. They both ship to Canada. The only thing is they more than likely won't have the proper CA stamps.
If I recall correctly, CGNer 6167 might have them as well.
RGG7, please don't take this the wrong way. I've personally taken a couple of hundred 1949-1951 CA completed No4 MkI* rifles out of cardboard boxes, with some brown wax paper wrapping but that's it. Nothing like the No4 MKII rifles built in England.
Have you seen them in similar wrapping to the UK built rifles???
Since many of the last run of Canadian No4s, went overseas, it's likely they had special wrappings. I've just never seen it.
I saw some pics of new 1949-1951 built Canadian No4s that were stored in Italy. None of them were wrapped. They were also stored without bolts. Most likely they were never matched up when sold.