Years ago, I picked up a '92 that had been rebarreled to .256 Win Mag. I don't know what the original caliber was. I never fired it, although I reload .256 for my Marlin 62. Recently, I took it out to clean and check its status. When I removed the plug on the end of the cartridge tube and the inner spring, another tube, smaller in diameter than the outer tube, also slid out. I don't remember any inner tubes on any of the other '92s. (Been a while.) Did Winchester put these inner tubes in the smaller 25 and 32 WCFs and use a "standard size" outer tube on all their rifles? Or, is this the invention of whoever changed the barrel?