This afternoon I put the 10.5 inch coil on the 1266 and took it to the horse show arena I've posted about to see if I could get a deep coin. We've hunted the horse show arena so much that finding a coin of any kind is a scarce occasion, but most of it has had from two inches to over a foot of fill dirt added and there are still coins there, but some of them are undoubtedly a foot or more deep because of the added fill. I set the sensitivity to halfway in the high sensitivity mode, Disc 1 just below Nickel accept and Disc 2 just below zinc penny accept and the 1266 was chattering and popping on every swing. The first solid signal that gave a weak response didn't disc out in either mode so I dug. It was a smushed screw off aluminum bottle cap deeper than my 12.25 inch digging tool. The second weak signal that didn't disc out at zinc accept was a fired .22 bullet at 4 inches and the third weak signal was a nickel size piece of lead at 8 inches. The next signal was a 1968 penny at 10 inches, followed by several more trash targets in the 7 to 9 inch range and a 1973 penny between 8 and 9 inches down. It was so wet I was soaked by then so I called it a day. The 1266 is deep, but I've found coins that deep with the Barons without having to listen to the nonstop noise and without having to dig every piece of trash over 6 inches deep to get them. If the weather permits I'm gonna use the 1266 at an older site this weekend and take it back to the owner. I'm glad I got the opportunity to use a 1266 again, but I don't think I want to use one on a regular basis.