I am at the Smith & Wesson Collectors Association Annual Symposium. A member here has for sale a white box of .40 S&W 180 grain JHP. See the pic below. The box is empty. The seller told me that this ammo was developed by Olin in the late 1980s at the request of S&W for their forthcoming .40 S&W line of pistols. He said he had seen two other identical boxes, both of which has cases that had no headstamp information. Another thing I thought odd was that the box was for only 40 cartridges rather than 50. I wonder was the E.O.5178 reference is to…Experimental Order??
Here is an image I took of the box.