i have just started working up a .357 magnum load with H110 and a 158gr hornady XTP. right now im at 16.3gr of H110 and accuracy is very good, but i am finding small amounts of unburned powder after firing. i am already using a medium-heavy crimp so i wouldnt think that that is the issue. if i were to step up from a standard sp primer to a spm primer i am thinking that that may get me the better burn i need to eliminate the unburned powder issue, but i am concerned about causing too much pressure. according to my lee manual this is not a max charge, but not far from it. is it safe to keep the same load and just swap the standard primer for the magnum, or should i back off the charge (maybe 15.8gr?) and then try the mag primer?
this will be from a 3" barrel with no specific goal in mind; just to make my .357 all that it can be.
this will be from a 3" barrel with no specific goal in mind; just to make my .357 all that it can be.