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But they are all usable and do work fine in the garand.
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Some of those powders are different now.
Old H335 was a slower surplus powder, now it is a faster commercial powder.
H4895 was a Scottish powder, now the name is used for a different Australian powder.
Accurate Arms is now Accurate Powder and they were imported powders, now US-made powders.
Some of them just aren't great choices for accuracy.
IMR-4895 is very position sensitive in 30-06.
IMR-4064 is pretty much the same as it was.
W748 is decent with 150 grain bullets, maybe 168 grain, but the current Hodgdon version varies more than the older version.
BLC2 can act up and doesn't seem to do as well as 748 for a ball powder in 30-06.
The old surplus H335 load data is just dangerous these days with current H335.
Originally IMR-4895 /H4895 because old, pre-1976 IMR-4895 developed or 30-06, but Canadian-made, post 1977, IMR-4895 is a different powder.
Current IMR-4064 is closer to the original IMR-4895.