02-05-2014, 09:01 PM
Hey Guys,
I'm new here and would like some feedback on a project I've been thinking about. I've got a Springfield Model 1898 rifle chambered in .30/40 Krag. The barrel has been replaced and the stock was butchered in the process ("sporterized") killing any value. I was thinking about rechambering it, but the Russian round is about .003 in. bigger than the Krag. I was going to get a barrel blank from Green Mountain Barrels and rebarrel it. The rounds are close enough to the same size to work in the action. The 7.62 is actually only .050 in. shorter than the Krag. My concern is with the bolt. I can't find any info on pressures. I don't want the lug (single) to break and take a bolt in the face. Energy is similar with the 7.62 @ 2677ft/lb and the Krag @ 2209ft/lbs. Is this enough difference to matter? I've been a machinist for over 25 yrs but want to get into gunsmithing. This is the point of this project is to gain some experience. Whatcha think?
Keith
I'm new here and would like some feedback on a project I've been thinking about. I've got a Springfield Model 1898 rifle chambered in .30/40 Krag. The barrel has been replaced and the stock was butchered in the process ("sporterized") killing any value. I was thinking about rechambering it, but the Russian round is about .003 in. bigger than the Krag. I was going to get a barrel blank from Green Mountain Barrels and rebarrel it. The rounds are close enough to the same size to work in the action. The 7.62 is actually only .050 in. shorter than the Krag. My concern is with the bolt. I can't find any info on pressures. I don't want the lug (single) to break and take a bolt in the face. Energy is similar with the 7.62 @ 2677ft/lb and the Krag @ 2209ft/lbs. Is this enough difference to matter? I've been a machinist for over 25 yrs but want to get into gunsmithing. This is the point of this project is to gain some experience. Whatcha think?
Keith
kcraig514, proud to be a member of MetalworkingFun Forum since Feb 2014.