Ok I am thinking a 45-70 tube and a .444 tube. Any suggestions. I know the bullet selection is better for the45-70,but kinda like the difference factor for the .444 Also I want to build a 25-35. Im thinking a 12 gauge tube and get a .25 barrel,machine the shank for a press fit in the 12 gauge stub. Then weld the tube to the stub, then profile the barrel to the old taper style. Should not be an issue for the extractor,as a 30-30 one will work. I'm also thinking a 25-35 Tomcat,which is an improved 25-35. Any comment/ideas?