Snow, I agree with the much more experienced members. It probably arrived that way. When they arrive, I tend to be so overwhelmed that it's hard to be objective! I actually tested every big khuk I have by placing them one by one in the "V" of an oak tree and leaning on them. I'm about 180 lbs and over six foot by a few inches. This allowed me to really lean into them and, before I knew it, I was bouncing against the blade. Even my M-43, which is between 5/16 and 3/8 inch, just flexed some and pushed me back into position. My non-chiruwa WW IIs returned true also. In the past, I wondered how these things could be so strong. Then I thought of the fact they were leaf springs prior to becoming knives. They held incredible loads under horrible road conditions. I've seen a few, very few, curved blades on the forum in the year or so I've been around here. Auntie is always on them when they pop up. Take care and good luck.