"I also met Paul Kopsch. I was a 1st Lt stationed in Dayton Ohio and attended the OGCA shows in Columbus. At one of my early shows (late 1967 probably or perhaps early 1968) there was a table near the entrance with a series of metal plates (probalby 1/16 to 1/8 inch thick) welded about 2 inches apart to metal rods so that the whole set was about 3 or 4 ft long. A KTW bullet had been fired into the plates and had penetrated most of them with the bullet still stuck in a plate. The table was covered…"
I well remember KTW being at the OGCA shows at Columbus back around that time, and also seeing the metal plates which had been penetrated by KTW bullets. I specifically remember seeing on their table quite a thick steel plate, 1/2" or maybe even thicker, penetrated by a KTW bullet loaded in .35 Remington and fired from a rifle, but I don’t believe KTW ever loaded them for sale in .35 Rem. I had some KTW ephemera and a couple of letters from Paul Kopsch at one time, but after 40 years I have no idea where they are now. I believe only the earlier KTW bullet designs used Kennertium, which was later dropped, and I think they went to brass or bronze later. They also dropped the Teflon coating, which was purely decorative anyway. But I have no idea what the timeline was. . .