by AusC » 10 Jan 2014, 7:34 am
So here are the notes for you on a couple of loads GB, my mate's using the RCBS progressive press so the powder thrower will be a bit different, but here they are anyway...
Using AP50 he has the occasional load being .1 or so gr off. He'd noticed on the problem loads it seems to be an issue of the powder throwing catching on the powder granules as the arm goes up - There is a little extra resistance and it basically crunches through the powder to finish the throw.
Seems that it's either compressing a fraction more powder in, or push it out instead of cleanly parting the granules as the measure closes.
He found that the lower density AS30N would feed through the thrower more smoothly without 'catching' on the powder and crunching a little extra in or out.
He suggested just manually dispensing a bunch of powder through your thrower with it's handle instead of using the press, so you can easily feel if it's smoothly dispensing or getting stuck, and how often.
He's still turning a load of each powder in 2 different pistols, but that's the impression of things on the powder thrower issue.
Hope that helps?
300 Win Mag Tikka T3 Lite.
4-12x42 Zeiss Terra.
