AutoComp Ball Powder Reloading Data
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Smokeless Powder
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Bullet
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Lee Disk
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Powder Charge
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Shooting Results
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Winchester AutoComp
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Precision Delta, FMJ, 9mm, 115gr. COAL =
1.150 in.
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.30
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3.8 gr.
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Insufficient powder charge to
cycle slide. Rounds fired fine in both the Glock 19
and the Glock 26 but would not eject the spent case.
Tested 3/18/10.
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" |
" |
.32
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4.1 gr.
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Insufficient powder charge to
cycle slide. Rounds fired fine in both the Glock 19
and the Glock 26 but would not eject the spent case.
Tested 3/18/10.
|
|
" |
" |
.34
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4.4 gr.
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Insufficient powder charge to
cycle slide. Rounds fired fine in both the Glock 19
and the Glock 26 but would not eject the spent case.
Tested 3/18/10.
|
|
" |
" |
.37
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4.6 gr.
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All test rounds shot well
in both the Glock 19 and the Glock 26. Tested
3/18/10.
Insufficient powder charge.
See Update Below.
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|
" |
" |
.37
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4.6/4.7 gr.
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Update! Made up 100 rounds of this
recipie. Only 50% of thed rounds shot well
in the Glock 26. Some stovepipes. Some failure to
cycle.
Insufficient powder charge
Tested 4/1/10.
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|
" |
" |
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4.8 gr. |
Made and shot by a friend in his
new Gen 4 Glock 17. Insufficient powder
charge to cycle slide. Many stovepipes.
Some failure to eject. |
| COAL for all rounds =
1.150 inch |
Test
Results
On 3/15/10 I reloaded 10 rounds
each of the above recipes in an effort to determine the
proper charge weight of the Winchester AutoComp powder for
9mm Luger. All rounds were shot at the range and the results
recorded in the above table. Conclusion: 4.6 grains is the minimum charge weight needed to
properly operate a
Glock 19 and
Glock 26 when firing a 9mm Luger 115gr. FMJ Precision
Delta bullet with a COAl of 1.15 inch. At this minimum
charge weight the recoil experienced in both Glocks was mild
and the spent cases were relatively clean.
4/1/10 Update: Relying on the
results of my last shooting session I made up 100 rounds of
9mm Luger 115gr. FMJ Precision Delta bullet, 4.6 gr.
AutoComp with an overall length of 1.150 inch. I was
surprised to find that 50% of the rounds fired well. The
rest caused stovepipes or failure to have enough force to
cycle the slide. I ended up shooting most of these rounds
loading them one at a time in the magazine and manually
ejecting the spent
casing. During the same shooting session my friend had
made up and was shooting the same recipie of AutoComp but
with 3.8 gr. and was shooting a new Gen 4 Glock 17. He has
similar poor results. Apparently 4.8 grains is insufficient
powder for 115gr. FMJ bullets with a COAL of 1.15. We need
to do some more experimenting.
---------------------------
Winchester AutoComp Powder is a new
powder recently made available to the general public. One
and eight pound containers were made available at
Winchester dealers in
the Spring of 2009. Winchester AutoComp is rumored to be
Winchester's factory powder used in
many of their factory loads available for purchase to the
public.
POWDER
INFORMATION
From the
Winchester Web Site:
AUTOCOMP is extremely
fine in the 38 Super, 9mm, 45 ACP and 40 S&W race guns. It’s
just the perfect burning speed to feed the compensators with
a higher volume of gas. With AUTOCOMP competitors get off
faster shots with minimal muzzle flash, it’s a winner.
http://www.wwpowder.com/pistol.html
PRESS RELEASE
WINCHESTER
INTRODUCES A SERIOUS COMPETITION PISTOL POWDER
October 2008
For Immediate Release
Chris Hodgdon Public Relations Manager announced today a new
powder for the discriminating competition pistol shooter
AUTOCOMP™ WINCHESTER’S AUTOCOMP is highly suited for
delivering maximum compensator performance.
“AUTOCOMP is extremely fine in the 38 Super, 9mm, 45 ACP and
40 S&W race guns. It’s just the perfect burning speed to
feed the compensators with a higher volume of gas. With
AUTOCOMP competitors get off faster shots with minimal
muzzle flash, it’s a winner.”
Other characteristics of AUTOCOMP:
•
Clean burning for efficient shot after shot function
• Low charge weights for economy reloading
• Flawless metering through progressive loading machines
One and eight pound containers will be available at
Winchester dealers Spring 2009. AUTOCOMP data is now on-line
in the
Reloading
Data
Center. For more information
call 913-362-9455 or write to 6231 Robinson, Shawnee
Mission, KS 66202.
WINCHESTER® SMOKELESS PROPELLANT “For Loading Professionals
http:// www.wwpowder.com/press.html
9mm Loads With
Winchester AutoComp
..Mostly I load
Unique with 115 grain FMJ, 115 gr JHP, 124 gr plated
frontier, and "125" gr LRN. …Wanting to try a new powder, I
picked up a pound of AutoComp a few months ago. This past
week I finally loaded some rounds using 123 grain LRN set at
1.125 COL. …I loaded 10 rounds each at 4.0, 4.2, 4.4, 4.6,
and 4.8 grain. I fired them in a Beretta 92FS Centurion
(4-inch barrel) and got the following average velocity
readings using a ProChrono from Competition Electronics for
each load: 839, 750, 866, 952, 1007 fps. The Beretta failed
to cycle properly at the first two loads, but starting at
4.4 grains, it seemed to work okay. I did not try to figure
out my groupings at the time, but feel that I got a better
group at 4.6 grains.
http://www.reloadersnest.com/forum/topic.asp?TOPIC_ID=12811
Recipe Testing and Evaluation
This week I had a friend visit from
North Carolina. I took him to the
range on Friday around 5pm to shoot. It was very busy and
competition for brass was fierce (there were many reloaders).
I was lucky to recover my own brass. While I was there I
talked to a guy who was shooting 9mm Luger reloads using
WINCHESTER AUTO COMP. He seemed to like it.
I decided to buy a pound of it and test it myself. It seems
to be more readily available than TiteGroup or
Winchester 231 powder
but it is relatively new to the market. From the
internet - "The reloading man at Cabella's said
Winchester AutoComp is
their factory powder used in a lot of their factory loads
that has been released to the public."
I looked for a safe recipie for reloading 9mm FMJ Luger. The
Hodgdon
DataCenter
and my Lee manual did not have it. Searching the forums and
reloading sites did not have it . The email I sent to the
Winchester site to
request load data was returned as undeliverable. The local
powder supplier did not have it. You would think that
Winchester would have published and
promoted this data if they wanted to sell their product.
I decided to determine my own load recipies for AutoComp. My
thinking was as follows:
The most important thing is to find a safe DO NOT EXCEED
value.
The below table is from the
HodgdonReloading
DataCenter
for all of the AutoComp 9mm loads (all bullet weights).
Using the philosophy - the heavier the bullet the lower the
DO NOT EXCEED value then the lower of the two values for the
125 grain bullets should be a good DO NOT EXCEED value for
AutoComp using 115gr. FMJ.
DO NOT EXCEED = 4.8 grains.
This coincidentally matches the DO NOT EXCEED values of the
lee manual for Titegroup and Win 231 for FMJ.
