I think the initials are WK du PC; Could this be William Kemble DuPont Carpenter (1919 -1987)? He was the son of R.R.M. Carpenter and Margaretta Lamont DuPont and the nephew of Pierre S. DuPont.
Wow...yeah, that has to be right. How did you know that?
Did he have other rifles monogramed, or are you just familiar with the DuPont family?
Its just simple logic: the "du P" suggests DuPont. The "C" suggests the initial of the last name - Cooper, Cox, Carpenter, etc. It isn't far fetched to believe that someone connected to the DuPont family would indicate the fact by using a composite family name.
So, I simply googled "WK DuPont" and looked for a likely candidate with a "C" surname. The party chosen fit the initials and the time period, so voila.
