What's going on with this brass?

[psteinmayer]

H4350 and IMR4350 are very close... but slightly different in burn rate. Most reloading manuals will state whether the data is for IMR, Hogdon, Accurate, etc., and you will see a difference. When consulting your load tables, make sure you are using data for IMR4350 if you're using IMR powder, H4350 data if using Hogdon powder, etc. - and you won't go wrong. FWIW, I use IMR4350 in my Krag competition loads.

[S.B.]

Another great read! Great knowledge and experience is evident here.
thanks, Steve