Thread: 30-40 Krag load conundrums

In 1969 Winchester relocated it's factory to St Marks? It had been making powders prior to that from the late 1920's but what sort I don't know. Originally they may have been made from recycled stick powders. In 1969? they started offering 748 BR and 760 BR It is possible they had been producing powder for the military prior to that as 760 seems to be ideal for the .30-06. H414 was introduced in 1967 so it predates the shift and possibly 760 BR (certainly it predates 760) but is likely a surplus powder, production for the Korean war perhaps. The Speer data shows H414 as slightly slower than 760. Comparing a few loads of 760 BR with 760 shows that the BR version is slower as you would expect if that is what H414 is.
GPM.