9mm loadings with my 10mm powders

[Geeman]

The top end of what I shot with Long Shot, Pistol Power, AA7, and BE86 in the 7.75" barrel of the CZ Scorpion.  All loads were with 1.1175 OAL, 115g Xtreme plated HP, and CCI small pistol primers.

Long Shot 6.3g (over book)
1371
1378
1381
1398
1393

Stats - Average   1384.3   fps
Stats - Highest   1398.4   fps
Stats - Lowest   1371.01   fps
Stats - Spread   27.39   fps
Stats - Std. Dev   11.16   fps

Power Pistol
1413
1438
1442
1453
1451

Stats - Average   1439.35   fps
Stats - Highest   1452.54   fps
Stats - Lowest   1413.26   fps
Stats - Spread   39.27   fps
Stats - Std. Dev   15.88   fps

AA #7 (8.2g)
1311
1385
1385
1383
1393

Stats - Average   1371.44   fps
Stats - Highest   1393.29   fps
Stats - Lowest   1310.87   fps
Stats - Spread   82.42   fps
Stats - Std. Dev   34.09   fps

BE-86 (6.4g)
1438
1449
1466
1464
1459
1447
1461
1466
1445
1442
1439
1440
1439
1454
1454

Stats - Average   1450.78   fps
Stats - Highest   1465.66   fps
Stats - Lowest   1437.6   fps
Stats - Spread   28.07   fps
Stats - Std. Dev   10.33   fps

Greg

[The_Shadow]

The BE-86 is really working well for you in that longer barrel.

[Geeman]

The BE-86 is really working well for you in that longer barrel.

I loaded quite a few when I saw intercooler's post about your recommended load, and I'm not disappointed.  Velocity wise, it is between Power Pistol and BE-86, and I like the BE-86 better.  Power Pistol seems like its sharper in its blast/recoil, but it doesn't translate into fps.  That and its yield is slightly less.

The Longshot showed a distinct plateau around where I stopped my step-up.  6.2g yielded slightly higher velocity than 6.3g, and I threw a 1.6" 10 shot group with the 6.3g load (iron peep sights at 25 yards) just before I left the range.  Its not as hot of a load, but it is very pleasant to shoot.  I will be hitting the range again with 6.2, 6.3, and 6.4g loads to verify the edges of that plateau. 

The AA7 loads had the first shot of the string launch at much lower velocity, and it was repeated on a second string.  Its troublesome, but interesting none the less.  Its pleasant to shoot, but uses much more powder by weight.  Its a case full at that weight, but not compressed, so I doubt I'll be increasing that load, nor do I consider it a best option.

Right now I consider the BE-86 load the best for that bullet/gun.  I'm still not done playing with the Longshot plateau.

Greg

[The_Shadow]

Thanks for sharing your work, it is very interesting to me as I can compare notes.
I would agree as different bullet makes and weights can show favor with different powders.

I need to get to the range and test more too but we go from mild winter to unbearable humidity and heat.  After having been a fireman for years, I don't handle the heat well these days, it is because of some meds I take...