Update: As you may have seen I won the 308 size shims and received them as promised. It came at a very busy time for me as we bought an acreage with a nearly 100 year old house on it that needed completely renovated. Happy to say we are finally moved in and getting organized.
Today I got to play around in my new and improved (much larger) gun and reloading room and got out the shims Boondock sent me. I gotta say it's a pretty neat and simple way of solving the "slop" issue and I put a set in my 260 build. Pretty easy to figure out and does a nice job making the rifle feel more solid. So thanks to Boondock Outdoors and I recommend this product!