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WST in 9mm


h8dirt

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I guess my thinking is USPSA/IDPA based. I use WST for practice ammo only. WST is too inverse temperature sensitive for me to use it as match ammo. With that said, you'll load a little more WST in the summer and a little less in the winter. My objective is stay above 125 PF on my practice ammo, but no so much as to waste powder. My match ammo in 9mm uses VV N320 and WST "feels" the same to me and it's generally half the price.

I've notice the CZ's I have love shorter OAL's but I would only drop the OAL if it were to achieve better accuracy. I would NEVER use a reduce OAL to get a few more FPS out of a load... it's just not a safe way develop a load due to the increased pressures involved.

Every gun and every barrel are different. The first step is find a safe load that will yield a suitable power factor. The next step is to find which load among your safe loads is more accurate but still manageable. I say manageable as sometimes the more accurate loads are much higher power factors but the higher power factor often means more muzzle flip and therefore more time between shots.

It used to be fun developing loads, but now it seems too much like work. Enjoy it while you can.

Greatly appreciate the tips. I've just started to reload and it's already started to be annoying due to the scarcity of powder and primer.

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  • 2 weeks later...

Looking at some of the previous data from some of the posts (spreadsheet some where in here)... It looks like there is not much difference when loading 3.4 - 3.6gr of WST with a 147gr bullet. I wonder if this is why Winchester is concerned with using WST in a 9mm case?

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  • 2 months later...

Back in, hi to everybody:

Well, the 147gr. load with WST became my favorite to make Minor PF.

Now I want to try a 158gr. bullet with WST and want to ask for some load datas, has anyone tried this yet?

Especially powder charge and OAL would be a blast.

Cheers,

Jay

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  • 2 months later...

Just a update for more data points.

I shot NC and SC this year. Not sure the temp difference but both times I chromed the 2/3rd stage of the day.

3.7 WST with a Blue bullet 147gr round nose @ 1.110. was 142PF.

3.5 WST with a Blue bullet 147gr round nose @ 1.110 was 131 PF.

Gun is g4G17 stock barrel.

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Here is some data I got in CZ with Australian barrel. 1.110-1.115 135g bbi coated

4.1 1039 average 140.27 PF some pressure signs

3.8 982 average 132.6 PF

3.5 968 average 130.68 PF

I am going to go a little lower see how linear things are. ES and SD were much better with the lower charge than the higher.

Edited by inertia
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  • 2 weeks later...

Finally bought my own chrono so I could confirm my new load before winter sets in and reloading season starts!

4.0gr WST

124gr FP Extreme

1.07" OAL (nice and short for my CZ's, 1.08" plunks but didn't spin in my P-01)

Chrono results using my P-01 with a 3.65 inch barrel (per CZ UB measurement of 92.5mm, CZ USA measures it at 3.8 inches):

Low 995 fps

High 1030 fps

Avg 1015 fps

PF = 125.86

BARELY made minimum BUT I usually shoot a TS with 1.5" longer barrel so I should be closer to 130PF with that gun.

Need to do some experimenting with the crimp or increase to 4.1gr WST to see if I can group as tight as I was at 1.08" OAL I loaded last winter.

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I finished this off again CZ shadow with AUZ barrel bbi 135 1.110 oal WST

3.4 953 ave. 128.7PF

3.3 940 ave. 126.9PF

So bottom line is with coated bullet in a full length barrel very little is needed to make pf. I see loads at 4.5+ and that seems scary to me anything over 4 was showing me some primer flow in my gun.

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  • 1 year later...

Here is all of my chronograph data for WST in 9mm, shot across a ProChrono at an indoor range. Bullet weights range from 124FMJ to a 130 and 135 Black Bullets International coated bullet.

Pay attention to which gun was used - you'll see a Glock 34, 5" M&P, and a 4.25" standard-length fullsize M&P in the results.


Charge weights are noted to the hundreths because I drop ten charges on the scale and take an average.

Barrel: 5" M&P 9L / Apex SDI fitted barrel

Temperature: 65 degrees F (indoors)

Bullet: 130 gr BBI

Powder: 4.10 gr WST

Brass: Mixed headstamps

OAL: 1.110"

Primer: Winchester

1027,1033,1032,1053,1048,1020,1013,1063,1036,1041

Average = 1036.6 fps

PF = 134.75

ES = 36 fps

SD = 15.18

(Same load as above. Glock 34 factory barrel, back to back:)

1006,1014,1051,1043,977,1054,1054,1036,1034

Average = 1029.88 fps

PF = 133.88

ES = 48 fps

SD = 26.11

Barrel: 5" M&P 9L / Apex SDI fitted barrel

Temperature: 65 degrees F (indoors)

Bullet: 135 gr BBI

Powder: 3.60 gr WST

Brass: Mixed headstamps

OAL: 1.130"

Primer: Winchester

928,932,913,921,948,937,935,929,919,949

Average = 931.1 fps

PF = 125.7

ES = 36 fps

SD = 11.77

Barrel: 5" M&P 9L / Apex SDI fitted barrel

Temperature: 65 degrees F (indoors)

Bullet: 135 gr BBI

Powder: 3.80 gr WST

Brass: Mixed headstamps

OAL: 1.130"

Primer: Winchester

983,974,994,957,1000,993,998,989,966,988,975,976

Average = 982.75 fps

PF = 132.67

ES = 26 fps

SD = 13.33

Edited by MemphisMechanic
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Barrel: 4.25” M&P factory barrel

Temperature: 65 degrees F

Brass: Mixed headstamp

Bullet: 130 gr BBI

Powder: 4.1 gr WST

OAL variation: 1.105-1.110"

Primer: Winchester

989,1026,1007,946,986,1007,955,986,1018

Average = 991.11 fps

PF = 128.8

SD = 25.47

Changed guns and re-tested the above load

Barrel: 5” M&P Apex Semi-Drop In

968,1018,1005,1007,1040,1095,1056,1066,1016

Average = 1035.66 fps

PF = 134.6

SD = 35.81

Shortened the above load until it would pass the spin test in the short chamber of the 4.25” M&P. Dropped charge by 0.1 grain and still saw an increase in velocity.

Barrel: 4.25” M&P factory barrel

Temperature: 65 degrees F

Brass: Mixed headstamp

Bullet: 130 gr BBI

Powder: 4.0 gr WST

OAL variation: 1.050-1.055"

Primer: Federal

1035,1066,1046,1029,1024,1032,1031,1020,1070,1062

Average = 1041.5 fps

PF = 135.4

SD = 17.37

Changed guns and re-tested the above load

Barrel: 5” M&P Apex Semi-Drop In

1063,1095,1056,1101,1072,1059,1050,1084,1090,1037

Average = 1070.7 fps

PF = 139.1

SD = 20.09

Starting load with a 124 fmj for indoor matches and situations where I might shoot an outdoor stage with the sun in my eyes in the morning. Very little smoke.

Barrel: 4.25” M&P factory barrel

Temperature: 65 degrees F

Brass: Mixed headstamp

Bullet: 124gr Precision Delta FMJ

Powder: 4.0 gr WST

OAL variation: 1.1.135 – 1.140”

Primer: Winchester

1049,1062,1085,1006,1073,1039,1048,981,988,1025

Average = 1035.6 fps

PF = 128.4

SD = 33.34

Changed guns and re-tested the above load

Barrel: 5” M&P Apex Semi-Drop In

1038,1081,1101,1059,1073,1112,1072,1088,1103,1145

Average = 1088.46 fps

PF = 134.9

SD = 27.39

Testing my new load with a 135 BBI for this weekend’s sanctioned match. Very soft for 133 PF and only slightly smoky. Leaves the gun’s action cleaner than Solo1000 did. Also very accurate. 4-5" offhand group at 25yds which was not shot slow-fire and unsupported - how you'd shoot a distant target in a match. I expect group size to be around 2" with the gun bagged in, perhaps less.

Comparing the speed of the APEX semi-drop in to the factory barrel.

Barrel: 5” M&P Apex Semi-Drop In

Temperature: 65 degrees F

Brass: Mixed headstamp

Bullet: 135 gr BBI

Powder: 3.8 gr WST

OAL variation: 1.130 – 1.135"

Primer: Federal

991,997,999,978,971,990,978,981,1004

Average = 987.66 fps

PF = 133.3

SD = 10.58 (Tight SD!!)

Changed guns and re-tested the above load

Barrel: 5” M&P Apex Semi-Drop In

979,993,1001,996,1004,977,973,995,980,957

Average = 985.5 fps

PF = 133.0

SD = 13.97

Edited by MemphisMechanic
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