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michaelburns
I have some reasonably comprehensive data now for both the 364-200 and 360-150 in 38 S&W with several powders. 5″ S&W M&P unless otherwise indicated.
.364-200 @ 31mm COL, 10-11 BHN:
2.1gn Fiocchi FBlu32G (cf. Unique) – 550fps. Same load in a Webley Mk.4 = 490fps.
.360-150 @ 28.5mm COL, 50:1 alloy (6-7 BHN):
Accurate No.2:
2.4gn 720 fps
2.5gn 745 fps
2.6gn 745 fps
2.7gn 775 fps
2.8gn 785 fps, extreme spread really poor.Same bullet at 29.5mm COL
11gn Swiss No.2 BP : 680fps in Webley Mk.4, extreme spread 669-684fps. Most accurate load yet seen in this revolver, and far better than any nitro load!
michaelburns
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Even more data!
200gn .364″ again, in the S&W M&P 5″.
AA #5, measured with a repro Lee micro disk.
2.35gn 487fps. Lots of unburned powder
2.4gn 500 fps. Again, unburned powder
2.5gn 503 fps. Still unburned powder, but nothing worrisome.
2.6gn 519 fps.There was no real difference in the point of impact with these 4 loads, and 2.5gn seemed to be about the best, giving a nice 6 o’clock hold at 25m on the ISSF precision target. Which is not entirely consistent with the previous post’s data, but never mind. These things happen when shooting offhand under real conditions.
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