With shortages coming again I've had to buy some new power and new loads. From the loading handbook below I've tried H322 but being pretty fast it shot only ok with my 68gr Hornandy's with 22.3gr of powder. So I moved on.
Next I tried AA2230 and fell in love using my 68's at 23gr of power. It shoots great, burns pretty clean, nothing bad to say except stepping up to a 75gr Hornady it's not shooting as well. From the chart again you can see the AA2230 may just be to fast for the heavier round. So on to a new powder.
Now I've bought some AA4064 to use with the 75's. From reviews it seems to be just like the IMR 4064 but better and obviously the slowest burn out of all 3 of my powders. But there's no loading data. Now from the chart you can see the IMR 4064 and Varget are touching for the burn rate. I do have loading data for the Varget in 5.56 you can see from the second pic.
Im planning to use 3 loads from 22.5-24.5gr of AA4064 with the 75's. Anyone have thoughts?
