Kerz wrote on Apr 8^th, 2020 at 11:09am:

QL does produce some very interesting data.  Para's posting may help explain why I saw a significant increase in velocity SD with H4831 (no SC).  My results found 160 FTX and H4895 to be a very good combination for my rifle.  About 1.5 MOA vs 3.5 MOA using 220 gr RN and H4831.  The H4831/220 also had twice the velocity SD spread.  Just an observation from my limited study. Vic

In my 150gr experiments, about all the H4831SC I could stuff in the case produced lower velocity than both RL19 and my boosted 860 loads.  It might have caught up with just a tad more, and the increased weight of the 178gr might be helpful for it.  One thing I know Paul, if the pressure is too low, you'll wind up with little yellow kernals of unburnt powder dropping out of the mouth of your case and into the chamber upon extraction.  I don't know exactly where that takes place, IIRC around 40gr with a 200gr cast bullet in 30-06.  I shot a match with cast in the Garand at that level.  Good thing I brought my chamber brush!  Looking at Hodgdon data, even 49gr with a 180 only produces 35,900CUP.