Springfield Armoury

I found this from a book I just purchased and was wondering if someone with more knowledge and in the USA may chase this down or at least validate the authors information.

"However, the Springfield Arsenal, for one, validated the concept, producing a version of the M-17 rifle (When and where is the rifle now?)with a velocity over 2135 m/s (7000 fps) instead of the standard 855 m/s (2800 fps).

I posted it in an article on squeeze bores and at those speeds well that is fairly impressive.