124 MG JHP's versus 125 JHP Zeros

[BlackBuzzard]

I can get the Montana's.........not so for Zeros.

I'm thinking for my 9mm major load using Autocomp that the 124 MG's will perform very much like the 125 Zeros I just ran out of?

(1.1650 OAL; 6.8 autocomp, but a big st. deviation of 27fps) - I was surprised it made major at 171 PF.

Anyone out there with experience with both bullets?

BB

[Jonathan Taliani]

That's very close to the load data I have for my MG 124 JHPs. I'm getting around 175 PF at 7.1 gr AC at 1.165

[al503]

You'll most likely have to bump up your charge a couple tenths. MG's measure a little less than .355" and the zeros have always been slightly larger than .355" The velocity might also be affected by the jacket cover. I've read here that the MG's are a little harder.

[Parallax3D]

That's exactly the same load I use. 124gr MG JHP, 6.8gr Autocomp, 1.165" OAL.

I just shot the Illinois Sectional, and I chrono'd at 174.5 PF. The velocities were, (if I recall), 1399, 1426, 1397.

I chalk the high velocity on the second shot up to my press/powder throw combo. I'm using a Lee Loadmaster with the Lee adjustable charge bar, and sometimes it can be inconsistent from throw to throw.

[KermitShooter]

I am using the MG 124CMJ with 7.4 AutoComp, 181pf shoots flat, no signs of pressure.

[yoshidaex]

Accuracy between barrel/powder/bullet combinations seem to vary quite a bit.

[remoandiris]

I can get the Montana's.........not so for Zeros.

^^ This is why I use MG. And I am very happy with their performance. My performance on the other hand...

[Whitefish]

Another thing to keep in mind is that the bullet profile of the MG 124 JHP's is far different from the 125 Zero JHP's. At the same OAL, you will likely have less case capacity to work with with the MG's and that could effect the pressure significantly, especially in 9 major.

[al503]

Another thing to keep in mind is that the bullet profile of the MG 124 JHP's is far different from the 125 Zero JHP's. At the same OAL, you will likely have less case capacity to work with with the MG's and that could effect the pressure significantly, especially in 9 major.

Very good point, here. The MG's are longer and loading to the same OAL will lead to higher pressures, all other things being equal.

I load the Zeros out to 1.17" if its not a compressed load to make sure there is no set back when chambering. I can go up to 1.2+" with the MG's without setback.

[OpenDot]

I am using the MG 124CMJ with 7.4 AutoComp, 181pf shoots flat, no signs of pressure.

That's how I roll as well..

[captray]

Parralax....

Make sure you have the powder hopper on the right way.....with the hopper opening directly over

the charge bar opening. I have the same setup and its always right on.

Ray

[Parallax3D]

Parralax....

Make sure you have the powder hopper on the right way.....with the hopper opening directly over

the charge bar opening. I have the same setup and its always right on.

Ray

The powder hopper is on correctly. This ain't my first rodeo.

The problems comes from when/if the powder hopper gets jostled. That can cause the powder to settle into the cavity and cause a slight overcharge. It's not enough to cause a KB, but it is enough to raise the velocity a bit.

Edited September 11, 2012 by Parallax3D

[67ls7vert]

Any recommendations for 9mm minor out of a glock 34 with a strom lake barrel? I'm using Autocomp and 124gr MG's. I hope there is enough gas in Minor to make the comp work.

Thanks

[67ls7vert]

That's exactly the same load I use. 124gr MG JHP, 6.8gr Autocomp, 1.165" OAL.

I just shot the Illinois Sectional, and I chrono'd at 174.5 PF. The velocities were, (if I recall), 1399, 1426, 1397.

I chalk the high velocity on the second shot up to my press/powder throw combo. I'm using a Lee Loadmaster with the Lee adjustable charge bar, and sometimes it can be inconsistent from throw to throw.

Do you think I can just down load the 6.8gr of Autocomp down to some thing for minor?

[Desmo412]

Try 5.0 and 5.5 of Autocomp with a MG 124 for a minor load. 5.5 makes about a 145-150PF out of my gun. I use this load for falling steel matches. It works well, but my arms are covered in unburnt powder after about 100 rounds.

[blaster113]

I tried both bullets in my .38SC open gun; accuracy wise I cant tell the difference. Zero has a new conical profile bullet which looks like an HAP that I havent tried yet. not expecting any difference in accuracy though

[Parallax3D]

That's exactly the same load I use. 124gr MG JHP, 6.8gr Autocomp, 1.165" OAL.

I just shot the Illinois Sectional, and I chrono'd at 174.5 PF. The velocities were, (if I recall), 1399, 1426, 1397.

I chalk the high velocity on the second shot up to my press/powder throw combo. I'm using a Lee Loadmaster with the Lee adjustable charge bar, and sometimes it can be inconsistent from throw to throw.

Do you think I can just down load the 6.8gr of Autocomp down to some thing for minor?

5.3 grains of Autocomp SHOULD get you somewhere around 1150 fps and a PF of 142.