RinB:I'm a Bob lover and I'm not upset
The 25/06 is a somewhat easier cartridge to work up accurate loads for than the 257 Roberts,in general,across the board.That said, the 257 is generally pretty serviceable,and may take a bit more tweaking. I suspect this has something to do with the higher velocity generated by the 25/06,and the fact that both have 10 twist barrels.
Also,some Roberts rifles(M70's)in 257 Roberts had long throats and short magazine boxes,so bullets could not always be seated to optimum length in relation to the lands.Rechambering to 25/06 would "clean up" this problem.
