Originally Posted by Willys46
I may have been wrong, but I thought H4831 and H4831sc were the same powed other than Kernal lenght. I have shot both in my 7 rem mag with the same load with no difference. The H4831sc meters much better, but no difference.
During the shortage of poweder I found a 8lbs of H4831 and have not looked back. But the loads I see with Retumbo look interesting, but not enough to switch.
Even though they are listed as the same, H4831sc slightly faster although not much and it may
just be that it is newer or powder density is different because of grain size.
The one good thing about 4831 is that it is linear in pressure when increased .5 grains at a time
you can count on pressures increasing in predictable amounts.
Retumbo does not share this trait.(You can up the loads with predictable pressures then all of
a sudden pressures go off the charts).I have experienced this phenomenon with H4350 and retumbo
plus some of the re loader powders.
There are faster powders but speed is not the only thing to consider when loading for a rifle
or a pistol.
J E CUSTOM