Hey guys. About to make a chamber reamer for a wildcat.
Wondering about the clearance. In other words, if my cartridge has a base diameter of 0.513", do I cut +0.005" on the diameter for the chamber? For a chamber diameter of 0.518" at the base? If this was steel on steel, that would be a very nice slip fit. But I don't know what the tolerances are on chambers. I've made D-reamers before, but all were for low powered cartridges, mostly in blowback carbines, and had tons of slop.
This is going to be running a bit hotter, so I'm hoping to have a good chamber.
And no, I don't want to have a reamer made. I don't particularly need this wildcat, I'm just building something for the experience. Buying the parts won't teach me anything.
Also, if any of you have made a 458 straightwall case from 7mm rem mag brass, about 2.3-2.5" OAL, I'd like to hear about it. Something like a very short 458 win mag, but with a long throat for heavy bullets. Hoping for a nicely suppressible PDW cartridge, to run on fast powder and short barrels. I figure that 65k PSI should get stuff to 1000 fps really fast, then the actual muzzle pressure will be low, compared to something using a slower powder and lower peak pressure in the same length barrel.
Gotta be honest, I'm probably retarded, but it's fun.
Wondering about the clearance. In other words, if my cartridge has a base diameter of 0.513", do I cut +0.005" on the diameter for the chamber? For a chamber diameter of 0.518" at the base? If this was steel on steel, that would be a very nice slip fit. But I don't know what the tolerances are on chambers. I've made D-reamers before, but all were for low powered cartridges, mostly in blowback carbines, and had tons of slop.
This is going to be running a bit hotter, so I'm hoping to have a good chamber.
And no, I don't want to have a reamer made. I don't particularly need this wildcat, I'm just building something for the experience. Buying the parts won't teach me anything.
Also, if any of you have made a 458 straightwall case from 7mm rem mag brass, about 2.3-2.5" OAL, I'd like to hear about it. Something like a very short 458 win mag, but with a long throat for heavy bullets. Hoping for a nicely suppressible PDW cartridge, to run on fast powder and short barrels. I figure that 65k PSI should get stuff to 1000 fps really fast, then the actual muzzle pressure will be low, compared to something using a slower powder and lower peak pressure in the same length barrel.
Gotta be honest, I'm probably retarded, but it's fun.