Anchorite
Member
We are talking some old time stuff. Loaded to equal pressures the 257 Roberts does not give up anything to 243 or 6mm. When I hunted with the Roberts the 75gr. bullet was doing a chronographed 3500fps. That was with a 1:12 in a Douglas #5 weight barrel on a 98 action. Game is as dead with the 6mm's as the 25 calibers. I think if you take a look at varmint hunting bullets weights the difference between 6mm-06 and 25-06 narrows seriously. Sure enough the path of least resistance be a 25-06. Rifle looneys do not take the path of lease resistance. Incidentally, the chamber in my 6mm-06 was cut with a reamer that allowed use of the 270 case.
That would be cool to use the 270 case.