Hey there fellers! I was looking for a forum where I can get some expert gunsmithing advice. I hail from castboolits.com; thanks for having me! I am a novice gunsmith and I am trying to get my feet under me with building custom rifles. I can rebarrel and chamber one easy enough, and most modern firearms present no problems, especially when switching between like calibers (like 308win to 358win/243 etc) However, old military firearms are a different matter. I am trying to find out how to reform the feed rails/ramp to promote reliable feeding from a cartridge that is different than what the rifle was designed to cycle. I currently have a 7.7 japanees Arisaka that I am rebarreling to 358winchester. Its a cheap rifle that I wont cry too hard if I screw it up. Now obviously, the 358win is shorter than a 7.7jap. I am having a hard time sculpting the rails to get good feeding over a range of bullet weights. I get good results from long 250grain bullets, but it chokes on shorter ones, especially flat points. This is the second rifle I have tried, and both have been a breeze except for this one area. Can anyone point me towards the right books on wildcatting/rechambering rifles to function reliably with the new cartridges?