Thread: Ar2213sc load data for 2213

This is from a Yankee forum. He is commenting on the question "is H4831 the same as 4831". 2213sc is currently repackaged by Hodgdon as H4831. Whether that was the case for 2213 repackage as 2213 I don't know.

"The SC is supposed to have the same burn rate as the full grain size version, but burn rates are targets tested in water pool chamber using a PETN ignitor or in a vivacity bomb and those just dosn't always behave like a gun. The Australian AR2213 and AR2213SC powders these are Down Under are held to ±3% burn rate, or a 6% span. They obviously aren't the same lot, so that may be the issue. However, it is also the case that the higher the powder bulk density is, the less easily the igniting flame front moves through it, so variation could due to that and it might be solved by changing primers for at least one of them.

Bryan Litz said in his experiments he could find one load combination that did better with Federal primers and another that liked CCI, and so on. He recommends keeping several primer types around, since they are cheap and don't break down like powder so you can try different ones with different powders. This might even be a case where using a magnum primer with one and a standard primer with the other works best."