Hawkeye77 wrote:I thought that it could and would be done by alot of shooters but, i still don't get why there wouldn't be a major issue iwth headspacing and case seperations???
Forgive my ignorance but if you cut the neck down to far on another rifle cartridge this will result in the above mentioned problems... correct? Or is that only with higher powered cartridges???
Just trying to get my facts straight
Hawk
These cartridges (38spl, 357Mag, 44Special, 44Mag, 45LongColt, 454 Casull, 460S&W) all headspace on the case rim. Therefore the length of case forward of the rim has SFA to do with headspacing.
Most rifle cartridges (excepting things like 444Marlin, 45/70 and 458 Win Mag) headspace on the shoulder, not the rim. These cases are almost all based on the 8x57 case size in one way or another (8x57 first in 1888, then 30/06 in 1906, then 308 in 1950). The only common non-rimmed/belted cases not based on the 8x57 case are the family of cartridges based on the 222 Remington in 1950 (222, 223, 222Mag, 204, 221, 17Rem, etc.). They all headspace the same way, on the shoulder.
Technically 303 Brit, 22Hornet, 30/30 and belted magnum cartridges headspace on the rim/belt. But as they have shoulders which are well defined, canny reloaders set their dies up so the cases headspace on the shoulder like a 30/06. This improves case life substantially.
Back to your original question, firing a 38Special cartridge in a 357 Magnum chamber will work without danger. The issue comes when after having fired a couple of hundred 'cheap' reloads with lead bullets, you fire a full length 357 Magnum hunting round. The 1/8inch of chamber not used by the 38 Special round has had lead adhere to the walls. This lead changes the chamber specification, and if sufficiently bad, can cause the mouth of the 357 Magnum case to be unable to open enough to let the bullet go correctly. Eventually something will let go so the pressure can come out, but it might be the locking system of the rifle, not the case mouth release we normally want.