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Old 06-29-2009, 19:06   #47
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Join Date: Jul 2007
Location: Southeast, LoUiSiAna
Posts: 4,488
Well I went and tested June 27th, it was extremely hot, had to constanly towel off.
There was no data for Blue Dot or Power Pistol for the 9x25Dillon, but I worked these up from 357Sig loads.
But here are the results...

9X25 Dillon June 27, 2009 test
S&W 1006 with Bar-Sto barrel w/22# Wolff Recoil Spring
Temps 99 HOT!

Lyman 130.0 gr Soft Cast Devastator HP 0.356 1.255
Blue Dot 11.2 gr Winchester LP
Velocity 1342-1367 fps
Primers flatten some, little smear, leading light

Lyman 128.0 gr Soft Cast Devastator HP 0.356 1.255
Blue Dot 11.2 gr Winchester LP
Velocity 1343-1373 fps
Primers flat some, little smear, leading light

Zero 121.0 gr JHP 0.356 1.255
H-110 14.4 gr CCI 350
Velocity 1280-1335 fps
Primers flat some, little smear

Zero 121.0 gr JHP 0.356 1.255
Blue Dot 12.2 gr CCI 350
Velocity 1405-1438 fps
Primers flat some, lot of smear

Zero 121.0 gr JHP 0.356 1.255
Power Pistol 10.2 gr CCI 350
Velocity 1592-1620 fps
Primers flat, lot of smear

LEE 122.0 gr Hard Cast TC 0.356 1.255
Blue Dot 11.0 gr Winchester LP
Velocity 1340-1525 fps
Primers flat some, little smear, leading very light

For some reason the area around the firing pin strike was being wiped against the breech face, in one of the incident enough primer metal sheared to obstruct the firing pin. This caused one round not to fire, I dropped the magazine out, cleared the chamber, inserted an empty magazine so I could dry fire the pistol pointing downward, this cleared the obstructed fiing pin hole. All other rounds fired without incident.

Readings taken with CHRONY Master F1 @ 8' from first screen.

I have been looking into the Primer Smear situation a little more, it is only the middle area which flatten and is being rubbed hard against the breech face on ejection, the outer area of the primers are still rounded and the cases are not swollen or disfigured. However the firing pin dent is being flattened and smeared with some. These were well used 10mm cases sized to 9x25Dillon and head spaced to be tight to the breech face less than 0.002" free play.

This maybe a result of head spacing and timing, using the 9x25 Dillon barrel in the S&W 1006 pistol. I am using this setup with the Wolff #22 recoil spring and ejection is only 3' or 4' with these loads I have tested. This is less than that of the 10mm loads and 40s&w load case ejections with the same set up.

I suppose because of the necked down case the huge volume of gas, ejection timing is off. The recoil is not bad with the loads, the ejection timing is something I considered. Remember I did the barrel fitting to the slide and frame but the fit looks & feels right. Function was good with Double Tap Ammo at even higher velocities with out any primer wipe. I don't know what powder he uses for the factory loadings(probably only avalible to commercial loaders), but it is very silvery looking(almost chrome color) and looks to be a dense flattened ball grannuel about the diameter of Blue Dot flakes. This leads me to think temps being too HOT and the magnum primer use. The S&W 1006 stock spring is 18lb, I run the 22 lb spring for the higher impulse 10mm loadings and it functions well even with the 40S&W loadings.

I will test the loads with the 20lb and 24lb springs to see if there is a difference in the cycles. Also will test various primer/powder combinations to see if things change for better or worse. This is what makes handloading fun, I don't have to have the fastest bullets, but I want good reliability, function & accuracy. This is why I play this game of handloading.

I may drop a line on Mike McNett at DT just to see if he can shed any light on my situation.
Southeast, LoUiSiAna
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Last edited by _The_Shadow; 06-29-2009 at 19:10..
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