Josmund,
I just tried NE connicals in my MK85 54 this past Friday. I used 60 grains of T7 3f and got one four shot hole at 50 yards. With the same load I got 1 3/4" at 100 yards! It blew my mind! My best effort with sabots can only equal that group at 100. My original intent was to have a "summer" load that would not be so sensative to heat buildup in the barrel when shooting in warm months. But now I have a real predicament. This might be my best hunting load.
I only see two problems with this setup. First the NR 535 grainers litterally slide down the bore under the weight of the ramrod alone. I am concerned that there is not enough pressure holding the bullet on the powder should I be walking to and from a stand on hunt day. The other problem is that I calculate about 4.5 inches drop between 50 and 100 yards using the same point of aim. I am not stuck on flat tragectories, but his is a little more drop than I would like in a perfect world. Plus I have to admit that I am not a huge fan of excessive recoil. That heavy bullet will push you back pretty aggessively.