180gr XTP 14.2gr's AA#9... smoking!

Intercooler · 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 ${$default_shocked_smiley}$ They made my grip panel loosen up at the end of the session ${$default_cool_smiley}$

EAA Elite Limited 4.75" 1398, 1397, 1400, 1397, 1382, 1383, 1392, 1389, 1398. Average = 1392.9 FPS/ 778 LBS ${$default_shocked_smiley}$

The_Shadow · 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? ${$default_huh_smiley}$

Intercooler · December 14 2014 03:05:11 PM MST

Let me see if I can find them in the mix.

Intercooler · December 14 2014 03:59:55 PM MST

Flattened some... not horrible.

Driftwood · 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.

Krumfola · 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.

sqlbullet · December 22 2014 10:54:03 AM MST

Compressed load. Shadow is reporting that the noses deform on seat/crimp on some of these.

The_Shadow · 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. ${$default_huh_smiley}$

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.