Thanks, Dave. Read the link, but I would think that the color gamut on my new Samsung QLED would be accurate. The settings on the picture were done by a professional installer. As I said in my initial post, the picture is sharp ,but dark, darker than the Blu-Ray. I just purchased Dunkirk, so I'm going to look at that picture this morning. Thanks again for your reply.Here's a pretty good explanation and visual about tone mapping.
https://www.avforums.com/article/what-is-4k-hdr-tone-mapping.13883