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7mm Weatherby magnum

 
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  #8  
Old 11-09-2012, 11:12 AM
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Re: 7mm Weatherby magnum

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Originally Posted by Birdhunter1 View Post
The Bullets I have used were the 168 Gr Berger VLD, a 160 grain Nosler and currently now the 150 gr. Sierra Spitzer.
Powders I can remember off hand (all wrote down at home) are IMR 7828, IMR 4350, Vita Vouhri N560, 570, RE 25, H 1000, RE22 maybe RE 19 as well.

This was done in the factory configuration, I've bedded the rifle and free floated the barrel, added a pressure pad back in, took it out..... About the only thing I haven't tried is tapping my foot while shooting and wearing a tin foil hat.


This gun is about to get re-chambered in a Shilen or Krieger 7 Remington mag and a McMillan or laminated stock. Driving me nuts.
That's the key here. The ten twist probably is too slow for those VLD's. I shoot 3/4" groups with 150 grain bullets in my 270mag without too much trouble. Try a bullet in the 150 grain area that has a B/C in the .45 range.
gary
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  #9  
Old 11-09-2012, 11:23 AM
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Re: 7mm Weatherby magnum

I've been on the 150's for a while. I know VLD's like to be seated near the rifling which I can't do on the 7 wby which is why I went to the Sierra. Consistency would be nice and I think after yesterday I may have a load that is good 'consistently' from 2 shots on a cold bore.
If I could get a 2 shot cold bore tight consistent group I'd go and run with it, which I may have. Keep the fingers crossed.
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Old 11-09-2012, 11:59 AM
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Re: 7mm Weatherby magnum

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Originally Posted by Birdhunter1 View Post
I've been on the 150's for a while. I know VLD's like to be seated near the rifling which I can't do on the 7 wby which is why I went to the Sierra. Consistency would be nice and I think after yesterday I may have a load that is good 'consistently' from 2 shots on a cold bore.
If I could get a 2 shot cold bore tight consistent group I'd go and run with it, which I may have. Keep the fingers crossed.
remember you have a ten twist barrel instead of a nine twist. I also would forget the Sierra bullets. The rifle you have dosn't like them. (I don't either). VLD's work best with throats cut for them. I'd buy a box of Speer 175 Grandslams and start over
gary
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  #11  
Old 11-09-2012, 02:41 PM
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Re: 7mm Weatherby magnum

An odd question, but what would be considered good accuracy for an elk load? We can't rifle hunt for deer in Illinois and I have a .243 that I have Antelope hunted with and would use on deer out of state, and I do coyote hunt with it alot. But for elk is 1 moa accuracy needed? I mean it is a huge target compared to a coyote, I realize where 1 minute accuracy would be great would 2 minute suffice to 5 or 600 yards?
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  #12  
Old 11-09-2012, 08:11 PM
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Re: 7mm Weatherby magnum

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Originally Posted by Birdhunter1 View Post
An odd question, but what would be considered good accuracy for an elk load? We can't rifle hunt for deer in Illinois and I have a .243 that I have Antelope hunted with and would use on deer out of state, and I do coyote hunt with it alot. But for elk is 1 moa accuracy needed? I mean it is a huge target compared to a coyote, I realize where 1 minute accuracy would be great would 2 minute suffice to 5 or 600 yards?
I would think 1.5" groups at 100 yards would be the max for shots out to 400 yards, but an inch would be about right for 500 yards or even 600 yards. But would still prefer smaller groups. Otherguys might differ.
gary
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  #13  
Old 11-09-2012, 10:55 PM
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Re: 7mm Weatherby magnum

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Originally Posted by Trickymissfit View Post
remember you have a ten twist barrel instead of a nine twist. I also would forget the Sierra bullets. The rifle you have dosn't like them. (I don't either). VLD's work best with throats cut for them. I'd buy a box of Speer 175 Grandslams and start over
gary
I've had excellent luck with sierra's up to the 7rum. I've always used the 140 pro-hunter though, as some of the others are a bit hard to get really accurate. Got a few hundred sierra 140's loaded right now for my 7rem and 7stw. Some pipes simply don't like boat tail bullets; I think you may have one of these. Try the 140 sierrs fb pro-hunter.
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  #14  
Old 11-11-2012, 12:24 AM
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Re: 7mm Weatherby magnum

I had similar issues this fall using a few different bullets in Dad's 7mm Weatherby. Last year I installed it in a B&C Medalist, bedded it and floated it while this year I worked up a load.

After working on loading for it every spare moment for 2 months with 160gr Accubonds and 168gr Bergers I tried the Barnes 150 grain TTSX in it at magazine length (3.360 total, though I measure each one to the ogive) and it was instantly Sub-MOA. Load is 75.0 grains of H-1000 though it's good from 74.7 to 75.5. The Barnes bullets are very consistent in weight and length, though I have had excellent results with even the few that are "less consistent" than the rest.

Give them a try and see how they work for you.

FYI I was told - and read - that rifles like or don't like bullets and that powders can then be used to fine tune a load. I have to say that with this rifle I completely agree with that.

Below are 100 yard targets from 74.7, 75.0, 75.5 and 76.0 grains. The 74.7 was a "sight in" load but obviously still within this load's potential.
Attached Thumbnails - Click to View Larger
7mm Weatherby magnum-7mm-barnes-loads.jpg  
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