10MM data dump. Happy 4th!!!!!

[Chris183]

10MM
1.250 COAL
New starline brass
Winchester large pistol magnum primers seated to .005"
Crimp diameter : 0.4231"
Projectile : Everglades 180GR JHP
Firearm : Glock G20SF with an alpha wolf threaded barrel 5.2"
Chronograph : Prochronograph digital, 8FT away from muzzle
Weather : 87F / 72% Humidity / 1,276 ft (389 m) elevation

10.2 GR Alliant Bluedot

1214, 1224, 1222, 1215, 1230, 1192, 1243, 1201
AVG : 1217.62 SD : 10.971
Muzzle energy : 592 (ft.lbf)

10.5GR Alliant Bluedot

1256, 1250, 1257, 1230, 1233, 1254, 1230, 1246
AVG : 1244.5 SD : 10.977
Muzzle energy : 619 (ft.lbf)

8.5GR Alliant Power Pistol

1235, 1226, 1247, 1268, 1251, 1259, 1256, 1265
AVG : 1250.87 SD : 13.55
Muzzle energy : 625 (ft.lbf)

8.7GR Alliant Power Pistol

1287, 1272, 1261, 1259, 1256, 1255, 1248, 1265
AVG : 1262.87 SD : 11.2
Muzzle energy : 638 (ft.lbf)

9.3GR Hogdon Longshot

1295, 1328, 1307, 1313, 1300, 1320, 1332, 1334
AVG : 1316.12 SD : 13.81
Muzzle energy : 692 (ft.lbf)

9.5GR Hogdon Longshot

1288, 1345, 1333, 1297, 1338, 1293, 1302, 1285
AVG : 1310 SD : 22.82
Muzzle energy : 686 (ft.lbf)

9.7GR Hogdon Longshot

1304, 1316, 1359, 1374, 1381, 1366, 1336, 1384
AVG : 1352.5 SD : 28.39
Muzzle energy : 730 (ft.lbf)

For funs :

1911 STI Trojan
5" barrel

9MM 147GR everglades FMJ
4.0GR VV N340
1.140 COAL

933, 952, 951, 955, 950, 936, 940, 951, 946
Avg : 946 SD: 7.3!!!
Muzzle energy : 292 (ft.lbf)
Power factor : 139.06

[The_Shadow]

Very Nice Chris, Thanks for sharing the data and the results...

[CurtisM]

Thanks for the data.

[Sobrbiker]

Looks like you passed the Longshot plateau, any pressure signs with the 9.7 load?

[Chris183]

Looks like you passed the Longshot plateau, any pressure signs with the 9.7 load?

I took pictures of all the fired brass casings.  Comparing 9.7 to 9.3, I'd say there's a significant pressure difference to warrant concern