We don't have an oversized expander for the 38-55, but there is another way to solve this problem. The 38-55 is actually a tapered case, even though it may appear to be straight walled. This means that you can adjust the diameter to which the case mouth is resized with your sizing die. Instead of adjusting the sizing die to touch the shellholder as per the instructions, start with the sizing die adjusted into the press so that it only resizes about 1/2 of the case. Measure the case mouth I.D. (inside diameter). Ideally you want the case mouth I.D. to be .002 to .003 under bullet diameter.
If the case mouth I.D. is smaller than this, back the die out one turn, and try resizing another case. If the I.D. is larger, turn the die in one full turn and size the case again. Once you get the case mouth I.D. where you want it, try rechambering the cartridge case in your rifle, just to be sure before you make a bunch of ammo.
