Post by oldstuffer on Nov 18, 2019 1:36:18 GMT -5
I think I've got a couple of pounds of IMR4895 sitting around. I use it for the Garand. Didn't know it'd burn fast enough for an AR.
I run the Hodgdon version underneath Barnes TSX's of 62gr weight.
Relative burn rate charts have their limitations, but they DO have their uses.
The .223R/5.56x45mm, once it left the development stage (and was forced to abandon a very "irregular" powder (lots of lot-to-lot variation), it settled on the same BallC (WC846) that the GI .308 was using (which had too much calcium in it and caused gun jamming issues).
The calcium was removed (most of it), the low-calcium version was renamed WC844 (Hodgdon 335).
People use H322 for some loads, look at the Hodgdon Relative Burn Rate Chart "medium rate powders" section:
76 Hodgdon H322
77 Accurate Arms 2015BR
78 Alliant Reloder 10X
79 Vihta Vouri N130
80 IMR 3031
81 VihtaVouri N133
82 Hodgdon BENCHMARK
83 Hodgdon H335
84 Ramshot X-Terminator
85 Accurate Arms 2230
86 Accurate Arms 2460
87 IMR 8208 XBR
88 Ramshot TAC
89 Hodgdon H4895
90 VihtaVuori N530
91 IMR 4895
92 VihtaVuori N135
93 Alliant Reloder 12
94 Accurate Arms 2495
95 IMR 4166
96 IMR 4064
97 Norma 202
98 Accurate Arms 4064
99 Accurate Arms 2520
100 Alliant Reloder 15
101 VihtaVuori N140
102 HodgdonVARGET
103 IMR 4320
104 Winchester 748
105 Hodgdon BL-C(2)
106 Hodgdon CFE 223
107 Hodgdon LEVEREVOLUTION
108 Hodgdon H380
Literally, everything in there is a "workable" burn rate for AR's in .223R/5.56x45mm, same as it is "workable" for any other cartridge that uses "medium burn rate" powders, things like .308W and it's comparable volume-to-bore brethren.
At this moment, I am using a deer hunting load with H4895 (#89), a test-load with light FMJ's with CFE223 (#106)
Just to use up a partial can of old powder, I have a bunch of cheap Varmegeddon's sitting atop Reloader 7 (charge is only 20 grains, I had to open the gas block about a full turn to drive the rifle over what 26.4gr of H4895 needed).