9 major

[36873687]

2 hours ago, dansedgli said:

Are small pistol primers ok to use in 9 major with autocomp? 

Idk about auto Comp. But aa7 an 115 grain is a no go. Blows out. 

[AKJD]

7.0 grains WAC, 124 PD JHP

mixed brass

CK Arms KKM barrel with 3 holes

 

Created: 01/08/18 14:07
Description: fas #2
Notes 1: 
Notes 2: 
Distance to Chrono(FT): 10.00
Ballistic Coefficient: 1.000
Bullet Weight(gr): 124.00
Temp: 63 °F
BP: 29.82 inHg
Altitude: 0.00
#          FPS  FT-LBS      PF
10    1391    532.83  172.48  
9    1400    539.75  173.60  
8    1397    537.44  173.23  
7    1417    552.94  175.71  
6    1399    538.98  173.48  
5    1393    534.37  172.73  
4    1397    537.44  173.23  
3    1404    542.84  174.10  
2    1404    542.84  174.10  
1    1410    547.49  174.84  
Average: 1401.2 FPS
SD: 7.9 FPS
Min: 1391 FPS
Max: 1417 FPS
Spread: 26 FPS
Shot/sec: 0.5
True MV: 1402 FPS
Group Size (in): 0.00

 

Edited August 2, 2018 by AKJD

[dansedgli]

What primers do you use?

[corbinfouquet]

For the love of god dont use srp. I've have the most luck with cci. I'm running 6.8gr of ac over 124 pd

[corbinfouquet]

1 hour ago, AKJD said:

7.0 grains WAC, 124 PD JHP

mixed brass

CK Arms KKM barrel with 3 holes

 

Created: 01/08/18 14:07
Description: fas #2
Notes 1: 
Notes 2: 
Distance to Chrono(FT): 10.00
Ballistic Coefficient: 1.000
Bullet Weight(gr): 124.00
Temp: 63 °F
BP: 29.82 inHg
Altitude: 0.00
#          FPS  FT-LBS      PF
10    1391    532.83  172.48  
9    1400    539.75  173.60  
8    1397    537.44  173.23  
7    1417    552.94  175.71  
6    1399    538.98  173.48  
5    1393    534.37  172.73  
4    1397    537.44  173.23  
3    1404    542.84  174.10  
2    1404    542.84  174.10  
1    1410    547.49  174.84  
Average: 1401.2 FPS
SD: 7.9 FPS
Min: 1391 FPS
Max: 1417 FPS
Spread: 26 FPS
Shot/sec: 0.5
True MV: 1402 FPS
Group Size (in): 0.00

 

I loaded to a 6.9 and made 176pf in one gun and 173 in the other. 

[Sarge]

1 hour ago, corbinfouquet said:

For the love of god dont use srp. I've have the most luck with cci. I'm running 6.8gr of ac over 124 pd

I’m running about 7.5 WAC @1.168 over 172 in my guns with PD 124JHP. I find Federal SRP and CCI SPP perform nearly identical

[corbinfouquet]

7 hours ago, Sarge said:

I’m running about 7.5 WAC @1.168 over 172 in my guns with PD 124JHP. I find Federal SRP and CCI SPP perform nearly identical

What does your breachface look like

[AKJD]

I use Winchester spp.

OAL: 1.165

[Stymie12000]

13 hours ago, 36873687 said:

Idk about auto Comp. But aa7 an 115 grain is a no go. Blows out. 

I've shot 1000's of 115gr MG jhp with 10.3gr of #7 1.150 with spp. Never had an issue (primers blowing outlet) or flat primers with this load and spp! About 174 power factor!

Edited August 2, 2018 by Stymie12000

[36873687]

2 minutes ago, Stymie12000 said:

I've shot 1000's of 115gr MG jhp with 10.3gr of #7 1.150 with spp. Never had an issue (primers blowing outlet) or flat primers with this load and spp! About 174 power factor!

10.55 aa7 those are spp

[Stymie12000]

13 minutes ago, 36873687 said:

10.55 aa7 those are spp

Those definitely look unhealthy!

 

I wonder if the hardness of the primer cups of different brands come into play?

 

I've always used s&b primers. 

Edited August 2, 2018 by Stymie12000

[36873687]

I think it does those are Winchester. But I’ve used tons of S&b in limited 

 

[chevrofreak]

I have run 10.5 AA7 behind a 115 and never had poked primers. 

[RiggerJJ]

7 hours ago, corbinfouquet said:

What does your breachface look like

Exactly...

 

If you have blowouts, you are overpressure with those components, gun may have problems...

Spp SHOW overpressure signs in pistols, srp do not. I use win spp with no problems. There are only about 3-4 powders that will work without overpressuring in 9mm major. Ones I know will work are...

HS6

Autocomp

Trueblue

Vhit 3n38

Edited August 2, 2018 by RiggerJJ

[36873687]

18 minutes ago, chevrofreak said:

I have run 10.5 AA7 behind a 115 and never had poked primers. 

Idk guess I’m lucky one. Srp for me. 

[racer-x]

4 hours ago, 36873687 said:

10.55 aa7 those are spp

 

So 10.55 grains AA#7 under a 115 bullet.

Wow, those look bad.

 

My favorite 9 load is 10.7 AA#7, CCI SPP, MG 115 JHP @ 1.165 OAL. In my CK Thunders this makes 1500 fps and my primers do NOT look like that.

My barrels are throated so that plunk testing this bullet just contacts at around 1.205 OAL.

AA#7 is the slowest powder commonly used for 9major and should yield the lowest chamber pressures compared to other powders with same components, velocity and gun.

 

What is your OAL? Are you absolutely positive that your bullet isn't contacting the barrel leade when chambered?

Have you plunk tested this bullet in this barrel to determine the OAL that just contacts leade?

If your bullets are contacting the leade while just chambered, pressures will be higher.

 

What primers are these? Winchester? Have you tried other primers? I've used tons of CCI SPP over the years - never seen damage remotely like this in my loads.

 

Have you chrono'd these loads? Maybe a lot hotter than you think?

 

Any chance you have a bad lot of powder? Contaminated with another powder maybe?

You absolutely sure of charge weight?

You absolutely sure of bullet weight? (124's look a lot like 115's)

 

 

[36873687]

7 minutes ago, racer-x said:

 

So 10.55 grains AA#7 under a 115 bullet.

Wow, those look bad.

 

My favorite 9 load is 10.7 AA#7, CCI SPP, MG 115 JHP @ 1.165 OAL. In my CK Thunders this makes 1500 fps and my primers do NOT look like that.

My barrels are throated so that plunk testing this bullet just contacts at around 1.205 OAL.

AA#7 is the slowest powder commonly used for 9major and should yield the lowest chamber pressures compared to other powders with same components, velocity and gun.

 

What is your OAL? Are you absolutely positive that your bullet isn't contacting the barrel leade when chambered?

Have you plunk tested this bullet in this barrel to determine the OAL that just contacts leade?

If your bullets are contacting the leade while just chambered, pressures will be higher.

 

What primers are these? Winchester? Have you tried other primers? I've used tons of CCI SPP over the years - never seen damage remotely like this in my loads.

 

Have you chrono'd these loads? Maybe a lot hotter than you think?

 

Any chance you have a bad lot of powder? Contaminated with another powder maybe?

You absolutely sure of charge weight?

You absolutely sure of bullet weight? (124's look a lot like 115's)

 

 

My barrel been reamed. 1.165 ovl is my length. I have plenty of room. 1480 FPS is my load. At two majors 171 pf an 170.8. It’s a ck thunder also. I’m not new at reloading. I’m not scared of srp all guys local to me uses em including open national champion

[36873687]

3 minutes ago, 36873687 said:

My barrel been reamed. 1.165 ovl is my length. I have plenty of room. 1480 FPS is my load. At two majors 171 pf an 170.8. It’s a ck thunder also. I’m not new at reloading. I’m not scared of srp all guys local to me uses em including open national champion

An Those were Winchester. 

[kneelingatlas]

4 hours ago, RiggerJJ said:

There are only about 3-4 powders that will work without overpressuring in 9mm major. Ones I know will work are...

HS6

Autocomp

Trueblue

Vhit 3n38

 

Add to that:

 

AA5

AA7

3N37

Silhouette

CFE Pistol

Lovex D037.1

Longshot

 

All of which I'd prefer to Autocomp

[chevrofreak]

4 hours ago, RiggerJJ said:

Exactly...

 

If you have blowouts, you are overpressure with those components, gun may have problems...

Spp SHOW overpressure signs in pistols, srp do not. I use win spp with no problems. There are only about 3-4 powders that will work without overpressuring in 9mm major. Ones I know will work are...

HS6

Autocomp

Trueblue

Vhit 3n38

I haven't used True Blue, but I have used the other three and have had blown primers with Autocomp and HS6 with loads that other people were using just fine and dandy, in both my CK and Glock open guns.  I dont think it is possible to seat a bullet on top of a big enough charge of 3n38 to blow anything up. 

[RiggerJJ]

I guess I should have added the qualfier that that was with 2011s. I haven't messed with the short oal required with other FAs...

Edited August 3, 2018 by RiggerJJ

[racer-x]

3 hours ago, 36873687 said:

My barrel been reamed. 1.165 ovl is my length. I have plenty of room. 1480 FPS is my load. At two majors 171 pf an 170.8. It’s a ck thunder also. I’m not new at reloading. I’m not scared of srp all guys local to me uses em including open national champion

 

Just trying to help

Seems like there are two possibilities here:

Either your

A) primers are soft and that's just what a normal 9 major load does to them

-or-

load is at dangerous pressure in your gun for some reason

 

If A is the case, switching to harder primers is the ticket. Maybe CCI SPP are enough harder that they handle these pressures without problem?  And of course SRP will work as well, they just won't act as an overpressure indicator like SPP's.

 

If B is the case, something is causing it and should be changed to prevent damages or injury.

Since you confirmed velocity is normal, seems like the remaining most likely possibilities for overpressure are:

- chamber throat is too short for your cartridge.

- your 115's are heavier than 115

- bullet diameter is not expected .355?

 

I know these all seem unlikely, but something is up. The damages to your primers is just not what you should get with your AA7 load. 

 

Back to the 'chamber throat is too short for your cartridge", you said your barrel was reamed... 

My PVD barrel was reamed again as well. I plunk tested it and found my 1.140" OAL MG115JHP loads still contacted the leade in my barrel. Ended up getting a carbide throater and did it myself until I could plunk test my cartridges at 1.205 OAL. This way my 1.165 OAL loads have around .040 freebore. Having some freebore space allows that initial movement of the bullet at ignition with minimal resistance. Lets it build speed before it is pressed into the rifling.

 

How long a load can you drop into your chamber and still be able to freely spin in place with your fingers and it falls out with just gravity? (plunk test)

If you haven't done this, and after seeing your primers & load, I definitely recommend it. 

[36873687]

4 minutes ago, racer-x said:

 

Just trying to help

Seems like there are two possibilities here:

Either your

A) primers are soft and that's just what a normal 9 major load does to them

-or-

load is at dangerous pressure in your gun for some reason

 

If A is the case, switching to harder primers is the ticket. Maybe CCI SPP are enough harder that they handle these pressures without problem?  And of course SRP will work as well, they just won't act as an overpressure indicator like SPP's.

 

If B is the case, something is causing it and should be changed to prevent damages or injury.

Since you confirmed velocity is normal, seems like the remaining most likely possibilities for overpressure are:

- chamber throat is too short for your cartridge.

- your 115's are heavier than 115

- bullet diameter is not expected .355?

 

I know these all seem unlikely, but something is up. The damages to your primers is just not what you should get with your AA7 load. 

 

Back to the 'chamber throat is too short for your cartridge", you said your barrel was reamed... 

My PVD barrel was reamed again as well. I plunk tested it and found my 1.140" OAL MG115JHP loads still contacted the leade in my barrel. Ended up getting a carbide throater and did it myself until I could plunk test my cartridges at 1.205 OAL. This way my 1.165 OAL loads have around .040 freebore. Having some freebore space allows that initial movement of the bullet at ignition with minimal resistance. Lets it build speed before it is pressed into the rifling.

 

How long a load can you drop into your chamber and still be able to freely spin in place with your fingers and it falls out with just gravity? (plunk test)

If you haven't done this, and after seeing your primers & load, I definitely recommend it. 

No I appreciate it. I know this load is safe. I can try other brand of primers. They are on money pd jhp 115 weight

[Sarge]

13 hours ago, corbinfouquet said:

What does your breachface look like

Normal

[wick]

On 7/10/2018 at 6:32 PM, 36873687 said:

Ck full size aa7 9.7. 1.165 Pd jhp124.     An 10.5 aa7 1.165 pd 115 jhp

spot on run same loads out of my CK