The factory springs that come with the Rem 700 ML are #24 and are a weak 24 at that.

http://www.gunsprings.com/1ndex.html

This is a much stronger spring than comes from the factory. I have changed several of thse out and it makes all the difference in the world when shooting caps. BUT, becareful of dry firing - the strength of this spring will get to the nipple sooner or later.