Thread: Gess what I`m doing.

What, a gain twist, I thought that was only with a old Navy .44 pistols. I`d need a sine bar like a crank handle. Now the bore is not bad but just needed reaming to clean up the drill scratch marks and smooth it out and enlarge it for the rifling cutter head to fit. I make up my own homebrewed reamer, it`s a 8"inch long flat bit of steel with a length of hack saw blade solded on one side and ground straight on the sides. Bottom has three pins to hold a packing bit of hard wood, this rubs on the bottom of the hole while the H/ blade is pressed against the top of the hole. It`s the square edge that scrapes the bore as it is wound through and with lots of cutting oil the metal coming off is like grey mud. To make it cut a bit more a thin strip of paper is placed between the packer and pins.
, Coming out with grey mud, sharp edges of blade scrapes the bore smooth.
, Reamer, paper packer, wood base.