I was lining up some 9mm brass to do a run of reloading for them and remembered that I didn't think I had much in the way of bullets for the 9mm. I looked in the closet and found some Speer Gold Dot 9mm 115g .355 boxes and also a Speer Gold Dot 357 Sig 125g. .355 box #3994. I bought that box as I had a Sig P226 with both the 40S&W barrel and the .357 Sig barrel but after shooting the .357 Sig about 25 times with factory ammo I put the 40 barrel in and never took it out. Forgot about the 357 Sig bullets Question: Why the 357Sig designation on a .355 bullet? Marketing ??