I finally had a chance to get back to the range for a ladder load test of 3F Swiss and 1.5 F Swiss 3 rounds each.
The range was full but mostly pistol shooters and the majority drive 130 miles from Chicago.
When I started shooting on the 200 yard line I got company from the pistol range wondering what the loud noise and smoke was from

so about 1/2 hr later I could shoot again. I let two guys shoot some fouling loads at the iron swinger and when they got them all shot up questions started again. This seems to happen quite often when I start shooting, but this is OK.
I might get out again tomorrow and shoot the rest of the loads I have with the OE powder plus I want to confirm a couple Swiss loads again using 10 shots.
I'm pretty convinced this new bullet Arnie drew up the print for me for this new 371-459-E-DD is working very well.
I started shooting early hoping I can get ahead before the range filled and the tree shadows were covering the target and I had a hard time getting a good sight picture even with the scope on the rifle seeing the small 2" paster on the target and I had to go down range to see if I even got on the cardboard. I couldnt even see the holes through the Kowa scope.
Most of the shots are under 3" and some two out of three shots were 1-1/4" with one wandering out but I'm sure it was my shot break letting it get away.
Three shots were so close that it looked like an elongated hole with three shots that measured just 3/8". That group was one I shot when the sun finally hit the target. I want to recheck that load of 64 gr of 1.5 Swiss again with 10 shots.
There must be something about that 64 gr load looking at Ians post were he used it with a good showing.
But all in all all loads really don't look bad for just starting out.
Kurt