Thread: S&W 460
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Old 02-20-2014, 08:59 PM
RH45 RH45 is offline
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Accurate Arms load data doesn't make sense to me. They say 31.5-35 grains of AA#9 behind a Nosler 260 grain partition, but,34.2-38 grains of AA#9 behind a Barnes 275 grain XPB.
The XPB is a longer bullet, and seats quite a bit deeper than the Nosler partition, and in my experience, less case capacity means higher pressures, not to mention that the Barnes bullet is 15 grains heavier.
I loaded some partitions at 31.5, and some Barnes at 34.5. With both loads I needed to use a brass rod to tap the empty cases out of the revolver, and both loads chronoed about 1,850.
I emailed AA, and Barnes, and only got a response from AA, which said they didn't recommend going below 34.2 with the Barnes 275, but, I'm going to try some at 33 grains of #9, even though I THINK I SHOULD be able to drop to as low as 30 without any issues.
Accuracy wasn't outstanding with either load. The Barnes shot about a 2" group, and the partitions was more like 5". Accuracy testing was only at 75 yards, whereas the Hornady factory loads group about an inch at 100 yards.
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