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338 edge ladder load

 
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  #1  
Old 05-08-2013, 01:06 AM
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Join Date: Apr 2008
Location: British Coumbia
Posts: 109
338 edge ladder load

Here is a target I shot today with my 338 edge thatI just got back from having the throat shortened and longer mag box installed to eliminate the excessive jump to the lands I had before @ .307"

300gr berger
H1000
Federal brass
Fed 215 primer
COAL .020 off lands 3.945"

Barrel after re-throating is now 27 5/8"

89-93 gr in .3ish gr increments.

bolt lift was still smooth at 93 but there as a very faint ejector mark, not shiney and just barely noticeable.

Chrony is a blue beta shooting chrony

This was shot at 200 yards, I wanted to do it at 300 but our 300 yard backstop was down for rebuilding. Anything over 300 has to be done in the bush.

I have a few other brands of primers to use and will experiment with seating depths but not sure which steps to take first.

Looks like the gun wants to shoot and appears to be 3 different accuracy nodes showing up. Should I push it past 93 gr in hopes of hitting a higher node or should I be happy with 2760 fps. Seems like a lot of charges chrony'd in that 2760 range and took a while befor it made the jump to 2800!!

Advise would be greatly appreciated

Thanks

Brambles

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  #2  
Old 05-08-2013, 01:11 AM
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Join Date: Apr 2008
Location: British Coumbia
Posts: 109
Re: 338 edge ladder load

Also this is the first time shooting in many many months waiting for this rifle to get back to me and my technique was probably a bit rusty.
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Old 05-08-2013, 01:34 AM
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Join Date: Jun 2011
Location: SW Colorado
Posts: 270
Re: 338 edge ladder load

I did almost the same test with my edge with the same results. My top load was 92 and my accuracy load was 91.5 @ .010 off the lands. This gave me 2870 with no pressure, and 1" groups at 200. After 150 rounds tho I ended up with a carbon slicked barred and getting pierced primers even at 88 gr. I talked to Greg at Gre-Tan rise and fixed the problem. I moved the depth to .015 off, 89.5, and 2820fps. Every load from 89-91.5 went into less then 1" at 300.

Since this is your first few rounds out of the barrel I would continue to break the barrel in. Shoot it again now you know how it feels. With the barrel broken in and a good feel for the rifle, it will give you better results. And if at all possible shoot it more than 200.

Mike
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Old 05-08-2013, 09:50 AM
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Join Date: Apr 2008
Location: British Coumbia
Posts: 109
Re: 338 edge ladder load

Barrels got about approx 170 rounds through it, throat is fresh though.
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