from what I've read, some of the pre-60 250-3000 savages will shoot the 100 grain Remington Cor-Lokt bullet ok, some won't. Had a friend pull and measure the lenght of one - 0.928", so that might be a length to reference as a go/no go as a quick comparison for other bullets.
this web site has the lengths of many bullets:
http://www.jbmballistics.com/ballistics/lengths/lengths.shtml
