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powerboatr wrote:this #2 powder seems to burn FAAAASSSSST compared to the #7 accurate powder

Well, yeah, it is a much faster powder.

Although various powder burn rate charts will vary in how they rank powders, AA #2 is substantially faster than AA #7.

For example, Hodgdon ranks AA #2 as 25th fastest, with AA #7 as 50th.
http://www.hodgdon.com/burn-rate.html" onclick="window.open(this.href);return false;

Ramshot also has a nice powder comparison chart:
http://www.ramshot.com/wp-content/uploa ... _rates.pdf" onclick="window.open(this.href);return false;

AA #2 is similar in burn rate to VihtaVuori N320, Ramshot Zip, or Alliant Red Dot.
AA #7 is similar in burn rate to Hodgdon LONGSHOT, Ramshot Enforcer, or Alliant Blue Dot.

When I am trying a new bullet, I'll load just a few bullets on empty cases and then test their feeding first. Make sure they fit in the magazine and then feed consecutively in the chamber and rack the slide a few times.

Once I find a length I want to try, I'll load about 25 rounds for each powder level I want to try at the next range trip.

I won't load a couple hundred rounds with a new bullet until I've tested it. I learned the hard way that pulling the bullets on a couple of hundred rounds is a real pain.

Nope, I don't see any problem at all.

As a matter of fact, I think my next 9mm bullet mold will be the Lee 105 gr SWC for my 9 mm.