Speer Reloading Manual Number 10. Starting load for 130gr is 31.5 gr of 748, max load is 35.5gr. They shoot very well.Where did you get the data? On the Hodgdon site, that's a max load for a 150gr. bullet. Almost certainly low pressure situation, given you are running a lighter bullet.
Yeah, thanks Mike, that's how I'm gonna go. The load shoots really well in my rifle so I can definitely live with a little extra work cleaning up the case necks. Thanks to all for the replies. 340kaFound the same load in Speer #12. I'd gues that they ran out of powder capacity before hitting top pressures, but that's a guess. Anyway, you got it out of a manual and aren't at max, so I wouldn't worry too much about it.
Try using Magnum L.R. primers. The powder your using "WW-748" normally requires a magnum primer.
You are using a load about in the middle of the data listed ... the pressure may not be sealing the neck ... hence the blackened neck . Make sure you are using a magnum primer with this powder ... in fact if you are not using magnum primers that may be what's causing the problem ... use the same load with a magnum primer and see how they do ... I bet the black necks go away .
Sounds like you reduced that charge too much.. 34 grains is max for a 150 grain bullet in the 30-30
Well 748 isn't an extruded pellet type powder, so maybe that's why it's different.😉😉However, 748 seems to burn a bit more "dirty" than other extruded pellet type powders.