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 Post subject: 147 ELD-M ladder test / 6.5 Creedmoor
PostPosted: Thu Jul 11, 2019 12:01 pm 

Joined: Sat Feb 13, 2016 10:16 am
Posts: 1218
Finally was able to get out to the range and try those 147's in the Creedmoor with the 26 inch barrel. Results on ladder test at 300 yards and 5 mph variable wind.
No heavy bolt or flattened primers and loads were from 40.5 to 42.9 grains of H-4350 in .3 increments. Would the node be between #6 and #7 since there is a flat spot there? 6 and 7 looks flat on paper. Any suggestions?

Grains - FPS
1.) 40.5 - 2625
2.) 40.8 - 2658
3.) 41.1 - 2674
4.) 41.4 - 2697
5.) 41.7 - 2728
6.) 42.0 - 2758
7.) 42.3 - 2751
8.) 42.6 - 2770
9.) 42.9 - 2786

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 Post subject: Re: 147 ELD-M ladder test / 6.5 Creedmoor
PostPosted: Thu Jul 11, 2019 12:30 pm 

Joined: Sun Dec 24, 2006 12:20 pm
Posts: 29139
Location: Northern Virginia
That’d be where I’d start Mark. Those are some easy Bullets to get shooting and have yet to let me down.

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 Post subject: Re: 147 ELD-M ladder test / 6.5 Creedmoor
PostPosted: Thu Jul 11, 2019 1:38 pm 
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Joined: Mon Dec 23, 2013 6:41 pm
Posts: 246
Location: Wet Side of Washington State
It's a good place to start. When I start shooting more than one shot at each charge in the ladder I sometimes get slightly different data. It's one of the limitations of the ladder method - it doesn't take into account Es at each charge.


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 Post subject: Re: 147 ELD-M ladder test / 6.5 Creedmoor
PostPosted: Mon Jul 15, 2019 2:39 am 

Joined: Tue Aug 16, 2011 2:13 pm
Posts: 1572
Location: center of Pa
Mark , 6 and 7 look like a good place to start looking . did you do a seating depth test first ?


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 Post subject: Re: 147 ELD-M ladder test / 6.5 Creedmoor
PostPosted: Mon Jul 15, 2019 7:58 am 

Joined: Sat Feb 13, 2016 10:16 am
Posts: 1218
jimbires wrote:
Mark , 6 and 7 look like a good place to start looking . did you do a seating depth test first ?


Ooops, :shock: I forgot to do that seating depth first as you advised me to try. I loaded it to magazine length with about .030" clearance inside the magazine and did the ladder. The OAL was too long to fit with .005" off the lands.

I am on the same page with you all on #6 and # 7. Thanks fellas.

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 Post subject: Re: 147 ELD-M ladder test / 6.5 Creedmoor
PostPosted: Mon Jul 15, 2019 2:59 pm 

Joined: Tue Aug 16, 2011 2:13 pm
Posts: 1572
Location: center of Pa
Mark , lets be crazy here for a minute with an exaggeration . lets say your chosen COAL is only capable of shooting 3 MOA . you're only putting one shot on target at each given powder charge . your watching for vertical alignment , along with a narrow velocity spread . with 3 moa accuracy , that hole could be anywhere within 3 inches @ 100 yards . so getting a few holes to align vertically isn't going to tell the true accuracy story with a 3 inch tolerance . now if you did a seating depth test first at minimum powder charge ,so there's no powder influence , and found a 0.5 moa group to use for your powder ladder . I think your holes in the target would tell a much better tale of what's going on . this way of thinking is what got me doing seating first . I hope I cleared this up and not muddied it up more . any questions , just ask . Jim


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