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10mm Ammuntion => Reloading 10mm ammo => Topic started by: Intercooler on December 14 2014 01:39:48 PM MST

Title: 180gr XTP 14.2gr's AA#9... smoking!
Post by: Intercooler on December 14 2014 01:39:48 PM MST
   The Shadow made these out of some unknown 180gr XTP rounds loaded in Winchester brass. These might be a little hot for pistols without great support  :o They made my grip panel loosen up at the end of the session  8)

EAA Elite Limited 4.75" 1398, 1397, 1400, 1397, 1382, 1383, 1392, 1389, 1398. Average = 1392.9 FPS/ 778 LBS  :o


Title: Re: 180gr XTP 14.2gr's AA#9... smoking!
Post by: The_Shadow on December 14 2014 02:41:33 PM MST
Yep they were more than the book was showing but close to what you wanted to see tested.
Book load shows Hornady 180 XTP over AA# No.9 13.5 grains @ 1242 fps  34,100 psi.

The nose was starting to deform from trying to compress the powder charge @ 14.2 grains, I figured they would be on the hot side, But they were fairly close across the test, 18 fps difference high to low is pretty consistent!  What did the primers look like? ???
Title: Re: 180gr XTP 14.2gr's AA#9... smoking!
Post by: Intercooler on December 14 2014 03:05:11 PM MST
Let me see if I can find them in the mix.
Title: Re: 180gr XTP 14.2gr's AA#9... smoking!
Post by: Intercooler on December 14 2014 03:59:55 PM MST
Flattened some... not horrible.
Title: Re: 180gr XTP 14.2gr's AA#9... smoking!
Post by: Driftwood on December 15 2014 05:44:49 AM MST
I found similar stats out of my G20 with a 6" KKM barrel with a 180 XTP and AA#9.  I loaded all mine at 1.26 OAL and used Hornady load data which maxes out at 14.9 gr.

14.4 gr. averaged 1399 fps, StdDev 15.04
14.6 gr. averaged 1426 fps, StdDev 11.72
14.9 gr. averaged 1409 fps, StdDev 14.43

Primers were a little flat, the earth's axis shifted a bit and the fillings in my teeth rattled loose, but otherwise, no issues.
Title: Re: 180gr XTP 14.2gr's AA#9... smoking!
Post by: Krumfola on December 21 2014 08:29:03 AM MST
Maybe I'm missing something but I just don't see how you guys are able to seat a bullet to the correct OAL with that much powder. I run 13.3gr of AA9 with a 180 at 1190 (stock G20) and there's barely any room left in the case.
Title: Re: 180gr XTP 14.2gr's AA#9... smoking!
Post by: sqlbullet on December 22 2014 10:54:03 AM MST
Compressed load.  Shadow is reporting that the noses deform on seat/crimp on some of these.
Title: Re: 180gr XTP 14.2gr's AA#9... smoking!
Post by: The_Shadow on December 22 2014 12:54:42 PM MST
Krumfola, Just like sqlbullet mentioned I wrote
QuoteThe nose was starting to deform from trying to compress the powder charge @ 14.2 grains
This was with the older "Microspheres Formulations" of AA#9, the newer flatten ball powder formulations may stack up and compress better. ???

I have notice the nose deformation with all of the AA#9 loads I have tested at the upper limits, as the powder is trying to compress.  I have even witnessed where the bullet was actually moving back out (OAL changing) over time.
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