Hi,
I suspect that it will have the same (heeled) bullet Dia. Don't know about the case length. I shoot a .313 Dia bullet intended for a 32 colt center fire in a S&W number 2 (rimfire). If colt kept the bullet Dia as the new line when they wen to center fire, then the .313 bullet would be correct for the new line as well as for the S&W number 2. The S&W 32 centerfire brass is larger than the chambers on the S&W number 2.
Regards
Colt