09-05-2020, 04:37 PM
Got out this morning and ran these test rounds with H380.
27. 0 grains MV 2306, es 32 sd 11
27.5 grains MV 2356, es 35 sd 14
28.0 grains MV 2428, es 35 sd 14
28.5 grains MV 2459, es 23, sd 9
29.0 grains MV 2493, es 37, sd 15
29.5 grains MV 2527, es 38, sd 17
No FTF's; absolutely no pressure signs. The 29.5 grain load had the powder high enough in the case so that when I used the COL of 2.20, I was compressing the powder at least a bit. I think I can stuff another 1/2 grain in the case, and may try it. Bottom line for me and this rifle is that H 380 is very much a viable, safe powder to use in the ARC. It meters beautifully. While I was not "shooting for groups" on this trip, I did notice that the groups at 28.5 and 29.0 grains grouped quite nicely; a bit of horizontal stringing from the lighter loads, and 29.5 seemed to go vertical on me a bit. All groups were "minute of deer/hog" and I was most pleased overall.
27. 0 grains MV 2306, es 32 sd 11
27.5 grains MV 2356, es 35 sd 14
28.0 grains MV 2428, es 35 sd 14
28.5 grains MV 2459, es 23, sd 9
29.0 grains MV 2493, es 37, sd 15
29.5 grains MV 2527, es 38, sd 17
No FTF's; absolutely no pressure signs. The 29.5 grain load had the powder high enough in the case so that when I used the COL of 2.20, I was compressing the powder at least a bit. I think I can stuff another 1/2 grain in the case, and may try it. Bottom line for me and this rifle is that H 380 is very much a viable, safe powder to use in the ARC. It meters beautifully. While I was not "shooting for groups" on this trip, I did notice that the groups at 28.5 and 29.0 grains grouped quite nicely; a bit of horizontal stringing from the lighter loads, and 29.5 seemed to go vertical on me a bit. All groups were "minute of deer/hog" and I was most pleased overall.