I have been working some load development on a couple 270s. I have been trying RL26 ,RL16, Hunter, H4831sc and various bullets 130-150g.
One thing I have noticed is the H4831sc loads take quite a bit more powder than the manual say to match velocity and pressure. It has been this way with the last few pounds I have bought, all from different lot #s. Book max loads were very low velocity and no pressure signs, but about 2 grains over seems to fall in line - this was the same for both rifles. I am up at 62.5g with a 130 bullet and getting around 3,080 fps and no pressure signs.
All of the other powders tend to track velocity and pressure very close in these two rifles.
Anybody else seeing this with H4831sc? I just don't like going that far over book max (future trap) and have been leaning towards different powders because of it.
