The flier really concerned me with the 3.600" load. The 3.595" load actually had two shots that were touching. Their speeds were only 1 fps different and the 3rd shot was off a little.
All I can say, the rifle is shooting much better than the 1.25"--1.5" groups it was giving me the last...
I get what you are saying. Technically, the 3.605" batch is only changing the powder charge. The other batch is changing two variables but I wanted to compare the two batches with the same powder charge (67.3 grains).