Winelover
North Central Arkansas
The last couple of Springs, I've been working with a Armalite AR-10 Carbine and cast. I started with NOE's 200 grain 311365 SP, one of the few bullets that would feed with 100% reliability. I air cool my alloy, size and check on a Star then heat treat before lubing with Carnuba Red. BHN @ 18, after HT-ing. I gave up on this bullet, when the best 10 shot/100 yard groups were 2 MOA. I tried it with a multitude of powders ranging from IMR-4198 (fast on burn chart) to AA-4350 (slowest). Military brass (LC-05), CCI 250 magnum primers and 36.5 grains of AA-4350, yielded the 2 MOA groups. Tighter groups can be gotten, but at the cost of cycling the auto-loader.
Next bullet I played with is Miha's 180 Silhouette bullet. This is a much friendlier design when it comes to accuracy. Shot many 10 shot/100 yard, 2 MOA groups with powders ranging from N-135 to AA-4350, including AA-4064, N-140, Varget, IMR-4320, and N-150. Again, heat treated alloy, military brass, CCI 200's (except for AA-4350). Many of these powders gave 1 MOA groups for the first 5 or so shots, but subsequent shots opened them up to 2 MOA.
This year I'm focusing on NOE's 160 grain 311414 SP, basically a shorter version of the 311365 SP.....so much so that I use the same seating die depth setting for both bullets. My COAL (o-give) is 2.254 inches.
So far, H-4895 and N-135 have yielded 10 shots in 2 inches. Still have to test AA-2495, AA-4064, Varget, IMR-4320 and N-150...trying to find that illusive 1 MOA, 10 shot group @100 yards.
These are some of the 414's that I just finished up lubing for the upcoming testing. Sized on a Star, averaging .3118 diameter. Using Gator gas checks.
I use RCBS X- sizing dies, including their cast neck expander and seater. AR taper crimp in separate step .
Next bullet I played with is Miha's 180 Silhouette bullet. This is a much friendlier design when it comes to accuracy. Shot many 10 shot/100 yard, 2 MOA groups with powders ranging from N-135 to AA-4350, including AA-4064, N-140, Varget, IMR-4320, and N-150. Again, heat treated alloy, military brass, CCI 200's (except for AA-4350). Many of these powders gave 1 MOA groups for the first 5 or so shots, but subsequent shots opened them up to 2 MOA.
This year I'm focusing on NOE's 160 grain 311414 SP, basically a shorter version of the 311365 SP.....so much so that I use the same seating die depth setting for both bullets. My COAL (o-give) is 2.254 inches.
So far, H-4895 and N-135 have yielded 10 shots in 2 inches. Still have to test AA-2495, AA-4064, Varget, IMR-4320 and N-150...trying to find that illusive 1 MOA, 10 shot group @100 yards.
These are some of the 414's that I just finished up lubing for the upcoming testing. Sized on a Star, averaging .3118 diameter. Using Gator gas checks.
I use RCBS X- sizing dies, including their cast neck expander and seater. AR taper crimp in separate step .