Quote:I'm confused about what caliber Browning Single Shot I need to start with. I thought I would have to find a rifles chambered for a smaller caliber than the .25 WSSM so that the chamber could be bored out to .25 WSSM, but some of the rifles suggested are in calibers much larger than the .25 WSSM, how would work?
By the way SAAMI lists the .25 WSSM @ 65,000 psi and the .25-06 Remington @ 53,000 psi, so I'm not sure about Low Walls.
Thanks,
Tim
A 25-06 barrel would work, but the length of the 25-06 case (necked down 30-06) is much longer than the very short 25WSSM case. As a result, though they are both 25cal, the barrel must be "set back" to shorten the chamber length enough that the new reamer can be used to clean up the chamber. Don't have the two case lengths at hand, but am guessing the barrel will need to be set-back about 1.5". IIRC, the 25-06 barrels on the various 1885 models were 28" in length, so you have plenty of length to work with.
You might also consider a Ruger No.1B. They were also made in 25-06 and came with a 26" long barrel. Same thing there............ after setting back and rechambering in 25WSSM the barrel will still be about 24.5" long.
One possible problem may be how heavy the barrel is. You may find that the wall thickness on a set-back barrel is not thick enough to contain the very high pressure of the 25WSSM, as you've listed. The safe route would be to go with a new barrel with the needed wall thickness at the chamber. Any of the barrel makers should be able to give you guidance on same.