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Would you add powder or monkey with seating depth on this?

 
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  #1  
Old 11-02-2012, 01:25 PM
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Would you add powder or monkey with seating depth on this?

I'll post a pic later. I was at range this a.m. with the new 6.5-284, 140 Berger VLDs, Retumbo, Lapua, and 210M loads. I started at 54 grains and worked up to 57. My rifle peaks faster than most but I can still try 57.5 and 58 grains.

Anyway, the 55 grain through the 56.5 grain charge groups were all in the half inch or less size. The 56.0 grain charge produced a nice 1/4 minute 3 shot group.

Now, I think I can easily reproduce that 56.0 grain charge group and if so I can stop there. However, I could be sacrificing up to 2 grains of powder, maybe more. The H4831SC groups turned out to be all about an inch so I switched powder to Retumbo and I'm glad I did.

Would you find out the max powder charge of Retumbo, then work with some loads at that charge and down a grain, grain and a half and test a few seating depths, or would you confirm the 56.0 charge and just run with that?

The VLDs are seated 0.010 off the lands.
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Old 11-02-2012, 02:33 PM
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Re: Would you add powder or monkey with seating depth on this?

Derek,

You seem to be thinking like I used to think.

The 1/4 MOA groups if consistent will do more for field accuracy/confidence than more velocity.

Gravity is always constant. Especially in Ohio.

If the 2 or so grains of powder is a difference of at least 200 FPS I 'may' go for it but . . .

After having to purchase that barrel from you several hundred rounds earlier than expected I'd have severe second tho'ts on the extra FPS.

Looks like you have a shooter there!!
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Old 11-02-2012, 02:37 PM
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Re: Would you add powder or monkey with seating depth on this?

At what range did this happen?


If it were me I would do it just to see the result I suppose.
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Old 11-02-2012, 05:05 PM
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Re: Would you add powder or monkey with seating depth on this?

Quote:
Originally Posted by ICANHITHIMMAN View Post
At what range did this happen?


If it were me I would do it just to see the result I suppose.
my bad, 100 yards
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Old 11-02-2012, 05:22 PM
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Re: Would you add powder or monkey with seating depth on this?

The white squares are 1/2"

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Old 11-02-2012, 05:32 PM
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Re: Would you add powder or monkey with seating depth on this?

If it were me, I would repeat the same test you just did, but at 500 yards. Then when one goes 1/4 to 1/2 moa, I would verify it, and if it checks out, I would roll with it no matter the speed.
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Old 11-02-2012, 05:42 PM
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Re: Would you add powder or monkey with seating depth on this?

Quote:
Originally Posted by jpeaston View Post
If it were me, I would repeat the same test you just did, but at 500 yards. Then when one goes 1/4 to 1/2 moa, I would verify it, and if it checks out, I would roll with it no matter the speed.
Around here I don't have that readily available. I have to drive 80 minutes to Grant Co., KY to a friend's cattle farm to do that and then I have to borrow his atv to place the target. I agree it's a great thing to do but a real hassle unfortunately. The gun club goes to 200 yards. I have a friend that is a member of another shooting range but it's also an hour away and since I'm not "NRA" certified, they won't let me shoot past 300 there.

Each and every time I've gotten a group like you see with the 56.0 grain charge at 100 yards, it has been repeatable, and consistent with the last 5 custom rifles I've had. There are 2 that took some work to get consistency.
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