Originally Posted by Long Time Long Ranger
I just tried a new keg of Retumbo using my old loading data. It was way to hot. Has this gone the way of H-1000 with the newer batches faster burn rates than the older ones? Right now this batch of Retumbo is about the same burn rate as my old H-1000. Just wondering if anyone else has experienced this.
I have had the same experience with many powders that had different batch numbers some were
hotter and some were colder/slower. So I normally start a little lower and work up to the same
velocity if pressure allows on a new batch of powder.
Powder degrades over time and will become slower but it normally takes years.
There are a few powders that become critical with only a few tenths of a grain increase and
Retumbo is one of them. other powders can be increased 1 grain at a time and pressure goes
up linear while other powders will go up linear for a while and then suddenly go off the charts.
I am not sure why this happens and I'm sure that it is not the powder manufactures wishes
because he wants all of his powders to be consistant and reliable.
J E CUSTOM