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Max Online: 16728 @ 03/25/12 08:51 AM
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#7064374 - 02/03/18 01:34 PM Problem ELDX 7mm08
GLC Online   content


Registered: 02/25/09
Posts: 4870
Loc: BenBrook Texas
Next weird thing found. A couple of weeks ago I tried to workup a 7mmo8 load with 150 ELDX, could not find a good group. Went back to try 162 ELDX, could not get a good group also. Went broad spectrum with both 150 and 162 staying within .3 grains of powder 37 to 42. Had a few rounds left from last years workup so I shot off 5 rounds just for grins since I was already bummed out. Shot at a 3/4 inch barcode on a target so I wasn't necessarily holding the best I could possibly do. Shot real good with old loads so I went back home and loaded what I thought would be the exact replica of what I just shot. Same powder, same COAL to Ogive, same primer same gun, same everything only difference was 162 AMAX was last years load vs the new 162 ELDX. The only thing was last years workup the distance to Ogive was incorrect, old load was measuring at 80 thousands off off the rifling vs my regular 20 that I normally do. But since the old load shot so well I loaded the ELDX the same 80 thousands off to keep them the same. Groupings were all over the place again with best group at 1" or better. So my question is is there any difference between AMAX vs the ELDX at the same grain?

Pic is a 5 shot group at 100 yards, top hole is my 300 win mag.





Edited by GLC (02/03/18 03:53 PM)
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#7064410 - 02/03/18 02:20 PM Re: Problem ELDX 7mm08 [Re: GLC]
FiremanJG Online   content
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Registered: 12/16/08
Posts: 24054
Loc: Wolfe City, TX
I assume you meant stepping in .3 gr increments?

What I would do:

Clean the barrel.
Make sure everything is tight.
Find the rifling, and set .005" off the lands.
Find the best powder charge.
Then test bullet jump in .005" increments.

I understand wanting to shortcut your way to a good load, but this rifle is telling you, you have to start over with the new bullet.
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#7064491 - 02/03/18 03:52 PM Re: Problem ELDX 7mm08 [Re: FiremanJG]
GLC Online   content


Registered: 02/25/09
Posts: 4870
Loc: BenBrook Texas
Sorry, yes in .3 grain intervals.

Was afraid of that.

talked a little to Chad about this a couple of weeks ago trying to brainstorm. Shot barrel from dirty to literally stripping all copper out. No change.
Found rifling previously and have checked multiple times to to see if I was just missing something, started at .020 but will back down to .005. At .020 pretty well all charges I tried sucked. Closest I got was about 1 MOA. This thing used to shoot 1 holers at 100 yards that is why this is so frustrating.

Everything tight, checked twice.
Changed scopes, both SWFA and they have no issue on my 300 win mag.
This is on a chassis so it is sound
Barrel only has about 600 rounds in it, I don't shoot hot loads, I keep it from 2500 to 2600 from what Lyman and powder sites tell me but don't have a chrono.

Guess I will just start over.
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#7064504 - 02/03/18 04:15 PM Re: Problem ELDX 7mm08 [Re: GLC]
FiremanJG Online   content
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Registered: 12/16/08
Posts: 24054
Loc: Wolfe City, TX
What powder?
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#7064529 - 02/03/18 04:48 PM Re: Problem ELDX 7mm08 [Re: GLC]
RiverRider Online   content
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Registered: 11/11/07
Posts: 7867
Loc: Wise Co.
I had something like that once a few years ago, and it turned out I had pushed the shoulders back on my brass way too far. I never did figure out for sure why the adjustment of my sizing die got diddled the way it did, but I have a theory. No matter.

Have you looked at concentricity? Another idea, maybe you're brass needs to be annealed?
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#7064531 - 02/03/18 04:52 PM Re: Problem ELDX 7mm08 [Re: FiremanJG]
GLC Online   content


Registered: 02/25/09
Posts: 4870
Loc: BenBrook Texas
Originally Posted By: FiremanJG
What powder?

IMR 4064
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#7064536 - 02/03/18 04:59 PM Re: Problem ELDX 7mm08 [Re: RiverRider]
GLC Online   content


Registered: 02/25/09
Posts: 4870
Loc: BenBrook Texas
I use Lee dies, full size each firing, trim for length, de-burr, and load, fire three times then anneal.
Maybe I need to try another set of dies?
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#7064543 - 02/03/18 05:05 PM Re: Problem ELDX 7mm08 [Re: GLC]
RiverRider Online   content
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Registered: 11/11/07
Posts: 7867
Loc: Wise Co.
I don't see why they wouldn't work now if they were working before.

How are you weighing out your powder?
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#7064547 - 02/03/18 05:10 PM Re: Problem ELDX 7mm08 [Re: RiverRider]
GLC Online   content


Registered: 02/25/09
Posts: 4870
Loc: BenBrook Texas
Originally Posted By: RiverRider
I don't see why they wouldn't work now if they were working before.

How are you weighing out your powder?


Electronic scale, GemPro 250, and then verifying it on the beam scale from time to time. It is spot on each time.

I even took a couple of rounds apart from last year that shot good and they weighed correctly as what I had marked them.
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#7064590 - 02/03/18 05:45 PM Re: Problem ELDX 7mm08 [Re: GLC]
GLC Online   content


Registered: 02/25/09
Posts: 4870
Loc: BenBrook Texas
This is what it used to do.


This is what it is doing now



Edited by GLC (02/03/18 05:47 PM)
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#7064605 - 02/03/18 05:57 PM Re: Problem ELDX 7mm08 [Re: GLC]
FiremanJG Online   content
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Registered: 12/16/08
Posts: 24054
Loc: Wolfe City, TX
39.0 to 41.0 of H-Varget, and .005" off was where I was going. I know it is temp stable, don't know about the other. And in this case, temp stable not worrying about over-pressure, but the opposite.
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#7064696 - 02/03/18 07:15 PM Re: Problem ELDX 7mm08 [Re: GLC]
Judd Online   content


Registered: 01/22/09
Posts: 11719
Loc: Sachse, TX
Easy fix for me...shoot the Amax and forget the Eldx.
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#7064738 - 02/03/18 07:46 PM Re: Problem ELDX 7mm08 [Re: Judd]
FiremanJG Online   content
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Registered: 12/16/08
Posts: 24054
Loc: Wolfe City, TX
Originally Posted By: Judd
Easy fix for me...shoot the Amax and forget the Eldx.


162 A-Max is out of production. He's gotta convert at some point.
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#7064761 - 02/03/18 08:06 PM Re: Problem ELDX 7mm08 [Re: GLC]
GLC Online   content


Registered: 02/25/09
Posts: 4870
Loc: BenBrook Texas
Yep, i dont have any more amax.
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#7065010 - 02/04/18 02:17 AM Re: Problem ELDX 7mm08 [Re: FiremanJG]
Judd Online   content


Registered: 01/22/09
Posts: 11719
Loc: Sachse, TX
Originally Posted By: FiremanJG
Originally Posted By: Judd
Easy fix for me...shoot the Amax and forget the Eldx.


162 A-Max is out of production. He's gotta convert at some point.


I knew they aren't making them but i bet you could find and buy enough to burn that barrel up. Too many guys think the eld is good and selling their amax.
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