Remington rolling block was factory made in .303" and 7.62x54R. Many thousands of them in 7.62 were made for Russia in 1915.
I didna know that. Got a cite for the Russian rollers?
The History of Remington Firearms does not mention any number of Rollers being made for Russia, in the sections that I could find online, but it does say that Remington nearly lost their shirt on Moisin Nagant bolt guns ordered by the Czarist's in 1916-17(a million of them) and defaulted upon when they were overthrown.
I wouldn't be surprised, though, as Remington pounded out thousands of the actions for doing "conversions" over the years, mainly for export, as well as making literally millions of complete rifles, and farming out the rights to make Rolling blocks in a bunch of directions.
I have been able to find references to Rem Rollers being made for France, in 8mm Lebel, up to 1917 (same ref as above).
The only ref I have found so far for a Roller in .303, was a not very successful sporter that did not sell very well in the one year that they produced them in the Factory. But they did make them. Also in 30-30, and 30-40 Govt.
Check out
http://books.google.ca/books?id=jAm...X&oi=book_result&resnum=36&ct=result#PPA66,M1
It seems to be arranged fairly much in chronological order.
If you get Arms Collector Magazine, or know someone that does, there was a pretty good article on the Rolling Blocks as used to convert old military stock Muskets to breech loaders. It provides a pretty good insight into the sales tactics of the time, and makes mention of some of the things done in the Surplus trade much later on, mentioning the viewing of barrels full of Roller actions, the only parts saved, from stripped down military firearms.
Cheers
Trev