Loaded up some AR Comp today with 85 SMK to do an OCW and see how it shoots and velocities. Since there isnt much info out there on this combo I loaded up 5shot each in 0.3gr increments from 25.0 to 27.1 based off some QL numbers I ran. It was a tad under what I thought so Ill work up a little more from 27.1 but damn accuracy and SD's were excellent and no temp stability issues like with CFE223. Also, a much softer, more of a slight push recoil impulse vs CFE223.. Much smoother shooting. Everything was under 0.75" with multiple groups sub 0.5" all shot at 100yd.
I also wanted to test this American Reloading MP540 small stick powder that I bought 32lb of a while back and never tested any of it. If you search MP540 theres a few guys that tested it and said it was amazing and very similar to VV N140...
I had ZERO data for this other than the 308 data on the label so I tried cross referencing that with some QL data of similar powders and came up with an OCW/pressure test of 25.0gr to 27.5gr in 0.5gr increments. Well, I was a tad low on my pressure test.. 27.5gr was slower than I thought it would be so Ill work up some more loads from 27.5 to 29.5gr to get up around that 2850-2900 mark..
But, accuracy was really good with this MP540 and SD were excellent. Shit, the very first group I shot 25.0gr had an ES of 2.0 and an SD of 0.8 and was just a hair above a 0.25" group at 100yd..
Really looking forward to playing more with these 2 powders in 6 ARC. Especially from a temp stability standpoint compared to Lever and CFE223...
I also wanted to test this American Reloading MP540 small stick powder that I bought 32lb of a while back and never tested any of it. If you search MP540 theres a few guys that tested it and said it was amazing and very similar to VV N140...
I had ZERO data for this other than the 308 data on the label so I tried cross referencing that with some QL data of similar powders and came up with an OCW/pressure test of 25.0gr to 27.5gr in 0.5gr increments. Well, I was a tad low on my pressure test.. 27.5gr was slower than I thought it would be so Ill work up some more loads from 27.5 to 29.5gr to get up around that 2850-2900 mark..
But, accuracy was really good with this MP540 and SD were excellent. Shit, the very first group I shot 25.0gr had an ES of 2.0 and an SD of 0.8 and was just a hair above a 0.25" group at 100yd..
Really looking forward to playing more with these 2 powders in 6 ARC. Especially from a temp stability standpoint compared to Lever and CFE223...