i'll have to find my notes, but I have tried a couple of loads and got close but they were loud. I did try using foam ear plugs as case filler and the only noticeable effect was a 100 to 200 fps increase in muzzle velocity. The ear plugs were found intact on the ground down range. I just found some Trailboss, so that is going to be tried in the near future.
thanks for the ideas, mark.