Re: Hogdon H870
elkfirst, H870 is best with the heaviest bullets in large for caliber cases. As a rough guide:
.264 with the 140 grain or heavier in 264WM, 6.5/300 W'by
7mm with the 175 grain or heavier in 7mm RM, 7mmSTW, 7mmRUM
.308 with the 220 grain or heavier in 300 Weatherby, 300 RUM
.338 might work with the 300 grain bullet with the 338 WM, 340 Weatherby, 338RUM, but probably be marginal with bullets lighter than the 250 grain bullet.
I agree it will be interesting to see how the new H869 compares with the discontinued H870. Hope the above helps. Brian.