Chronographed some loads out of my G29 ( 10mm)

[Josh45]

These test were taking on November 1,2012.
The temp was around the mid 70's as it was pretty fresh out. It was around 11:45-12:00 Pm when I got started.

I set up the target about 7 yards, give or take a yard.
All was slow fire except the Test #4. I wanted to see if I could handle the recoil of the tiny beast and get a decent grouping as well.

The chronograph was in-between me and the target itself, So it was about 8-9 in front of me, Again give or take a foot.
All strings were 10 shots.

The chronograph is a Shooting Chrony Alpha.

This is what my load consisted of.

Firearm - Glock 29 ( Stock )
Case - R-P ( Nickel )
Powder - Accurate #7
Charge - 9.3 Gr
Primer - Federal LPP
COAL - 1.280
Crimp - Taper .420-.421
Bullet - 180 Gr FMJ FP

#1 - 914.8
#2 - 872.6
#3 - 947.4
#4 - 936.1
#5 - 945.9
#6 - 928.1
#7 - 953.5
#8 - 920.3
#9 - 959.2
#10 - 935.8

Avg Velocity - 931.4
Hi - 959.2
Low - 872.6
ES - 86.65
SD - 25.07
Avg Dv - 17.93
Energy Calculation - 346

I would like to hear what you think is right or wrong with this if anything.
As for recoil, I have shot 135, 155, 165, 18- and 200 Gr out this tiny beast and your hand still takes a pounding at any load to what I have seen. Fun as heck but after 40-50 rounds, Its time to stop!

I also have the target with me to show them off
This target is for this load ( obviously )

 

[Josh45]

Test # 2 consisted of the same load except that the load of the powder was bumped up to 9.6 Gr. It also consisted of the same distance from standing to chronograph to target. Nothing else was changed other than the increase in powder charge.

Forgot to mention, None of the cases have bulging or any other signs of pressure.

#1 - 956.1
#2 - 956.6
#3- 992.7
#4 - 960.1
#5 - 961.0
#6 - 953.8
#7 - 932.8
#8 - 956.0
#9 - 963.9
#10 - 960.7

Avg Velocity - 959.4
Hi - 992.7
Low - 932.8
ES - 59.98
Avg DV - 8.31
SD - 14.52
Energy Calculation - 367

 

[Josh45]

Test 3, Again same specs just increased powder charge to 9.9 Gr of powder.

#1 - 1023
#2 - 999.4
#3 - 1016
#4 - 1010
#5 - 1027
#6 - 1028
#7 - 1030
#8 - 1021
#9 - 1000
#10 - 1015

Avg Velocity - 1016
Hi - 1030
Low - 999.4
ES - 30.6
Avg DV - 8.86
SD - 11.10 ( IIRC )
Energy Calculation - 413

 

[Josh45]

Test #4. Powder charge is now at 10.2 Gr and all other specs are the same.

#1 - 1017
#2 - 1009
#3 - 1014
#4 - 997.9
#5 - 1004
#6 - 1052
#7 - 1033
#8 - 1042
#9 - 1052
#10 - 1027

Avg Velocity - 1025
Hi - 1052
Low 997.9
ES - 54.49
Avg DV - 16.41
SD - 19.64
Energy Calculation - 420

 

[readyeddy]

Not sure if I would say anything is wrong with the load. Can't tell right now if you're close to minimum because I don't have my reloading manuals with me at this time, but I think you're loads look a bit light for AA7. At 180 grains jacketed, I would probably get around 1100 fps for 3/4 loads.

 

[Josh45]

I haven't checked the manual myself either but these are on the light side as I am using Hornady #8 manual as they showed the lowest start charges. Being this was for a Glock, I decided to err on the side of caution and start low and work up.

 

[readyeddy]

Didn't see the later tests. Looks like the groups are tightening up with the heavier loads. Try working your way up to about one grain below max (assuming you don't see pressure signs before) and see if your groups start to shrink.

 

[readyeddy]

Of course there is the obligatory warning that you should get an after market barrel with fully supported chamber when shooting reloads.

 

[Josh45]

Velocity lacked a bit but that has to do with the barrel differences. They tested using a 5' barrel and I am using one under 4'. And I have to agree, The more the charge, The better the grouping by the looks of it. Well maybe except #4

Haha, Yeah, I have to get one ASAP. LoneWolf is the cheapest but I wonder if it is any good after watching that Hikock45 video ( did I spell that right? )

 

[readyeddy]

Looks like you're doing fine. Here's more 10mm data http://www.glocktalk.com/forums/forumdisplay.php?f=67

One of the contributors is the founder of DoubleTapAmmo.

 

[Josh45]

Thank you for the link!

 

[flyskater]

Title : Chronographed some loads out of my G29 ( 10mm)
"This is what my load consisted of.

Firearm - Glock 20 ( Stock )"

So which one did you use G20 or G29"

 

[Josh45]

Whoops! I never noticed that Flyskater. Thank you for pointing that out.
It was the Glock 29. Not the G20.

Ill fix that now.

 

[2zulu1]

I have McNett's AA #7 data, 10.9grs, Starline, CCI 350, 180gr XTP;

G29 - 1145fps
G20 - 1189fps
6" KKM - 1266fps

I've seen data as high as 12.0grs with 180s. I have data for 10.5grs, 10.8grs, 11.1grs and 11.4grs through a G20/6" KKM barrel.

Winchester 180JHP and 180GD chrono w/i 01fps, 180gr Golden Saber about 25fps slower.

5-15-07, 4260ft, 10% RH, 30.04" falling, mid 90s,
11.4grs AA #7, Starline, WLP, 6" KKM, Win 180 JHP;

1373fps/753fpe, ES 24fps, SD 09fps.

IMR 800X gives excellent numbers, but I find myself loading most loads with Longshot.

From McNett, Starline, CCI 350, 180gr Golden Saber, start 1gr lower and work up in 0.2gr increments;
G20, 9.6grs LS, 1294fps.

Enjoy!

 

[Float Pilot]

Make marks around the barrel of your taper crimp die and try making the crimp tighter and looser in known incriments... You will amazed at how much difference the crimp tension makes with the 10mm..

 

[Josh45]

Float, I'll give that a try on the next loads I try.

 

[Hondo 60]

it was pretty fresh out

OK Josh, I'll bite. What is "fresh"???

And I'm jealous as heck! In the 70s?
I need to find a rich widow so I can afford to be a "snowbird".

 

[Josh45]

Hondo, To me 70-75 degrees is pretty fresh to me

 

[gamestalker]

If you are loading with jacketed bulets you don't need to use any crimp at all. If you chamfer the inside of the case mouths, you don't need to bell or crimp at all. Whats more is that many reloaders don't know that crimping auto loading handgun cases does not increase neck tension at all. In fact, crimping of these type cases is only a means to removing the bell most use during seating. Also fact, if a case is inadvertantly over crimped it will distort the case, bullet, and reduce neck tension drastically.

I have been seating all my auto loading hand gun cartridges using this method for a very long time and I can tell you that no other method will be as consistent or produce more neck tension than not crimping does. It's also faster because you don't have to adjust the mouth bell or the taper crimp. Belling and crimping will never be a consistent process without trimming all of your brass to the same spec.

GS

 

[Jay/kEC2/10]

"This is what my load consisted of.

Firearm - Glock 29 ( Stock )
Case - R-P ( Nickel )
Powder - Accurate #7
Charge - 9.3 Gr
Primer - Federal LPP
COAL - 1.280
Crimp - Taper .420-.421
Bullet - 180 Gr FMJ FP"

My G20 /6"KKM will fail to feed @ 1.280 COAL and have never taper crimped below .422
1.260 COAL max. I will say the choice of powder is awesome stuff.