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Strange accuracy at LR-Thought?

 
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  #1  
Old 12-05-2013, 04:19 AM
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Strange accuracy at LR-Thought?

I have two loads developed for my 300WSM.

#1 is a Berger VLD, 210gr that is .194 center to center 5 shot group at 100yds-honestly.

#2 is a Nosler 168 Ballistic tip thats about a .75 group at 100yds. Didn't develop this any further as it was planned to by my "shorter range" deer load and .75 moa was good enough.

I was shooting at a 10" steel gong at 833yds. All ranged with the G7, no wind, nice warm calm day from rock solid prone with bags and everything.

The 168 nosler was ringing the gong every time, all too easy. Really it was a laser beam.

The 210 Berger, which is much more "accurate" at 100yds, was missing half the time. They were near misses, but misses none the less.

Any idea's how this all works out?

Is it a "bullet go to sleep" thing?

I am honestly lost on how a much more accurate load, that is such a higher quality bullet, can be all over the place, while the "factory seconds" ballistic tips were 100%........

Please advise......

Thanks
Dave
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  #2  
Old 12-05-2013, 07:01 AM
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Re: Strange accuracy at LR-Thought?

Is it a matter of grouping -vs- accuracy?
You talked about grouping at 100yds, but accuracy at ~800
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  #3  
Old 12-05-2013, 07:57 AM
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Re: Strange accuracy at LR-Thought?

Quote:
Originally Posted by Mikecr View Post
Is it a matter of grouping -vs- accuracy?
You talked about grouping at 100yds, but accuracy at ~800
How can a bullet that groups small at 100yds miss at 800 when a bullet that groups larger (less accurate) hit at 800?
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  #4  
Old 12-05-2013, 08:39 AM
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Re: Strange accuracy at LR-Thought?

had a buddy who owned a 7mag winchester that would group 3/4 of an inch for 5 shots at a 100 yards and at 250 wouldnt keep them reliably on paper. Something about that gun was causing instability that wasnt noticed until the velocity dropped to a certain speed. Could be that your gun is doing the same with those bergers
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  #5  
Old 12-05-2013, 08:56 AM
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Re: Strange accuracy at LR-Thought?

Just a thought for discussion cause I don't know the answer:

Could it be the 210 gr is approaching the limit of what your barrel and velocity can stabilize and once the bullet slows down it is destabilizing whereas the more appropriate weight bullet is maintaining spin and stabilization?

Are you chonographing the loads and see if you have a large Extreme Spread on velocities? If you did, the lower velocities loads could be losing stabilization.

Just posing theories
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  #6  
Old 12-05-2013, 09:17 AM
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Re: Strange accuracy at LR-Thought?

Quote:
Originally Posted by Daves762 View Post
I have two loads developed for my 300WSM.

#1 is a Berger VLD, 210gr that is .194 center to center 5 shot group at 100yds-honestly.

#2 is a Nosler 168 Ballistic tip thats about a .75 group at 100yds. Didn't develop this any further as it was planned to by my "shorter range" deer load and .75 moa was good enough.

I was shooting at a 10" steel gong at 833yds. All ranged with the G7, no wind, nice warm calm day from rock solid prone with bags and everything.

The 168 nosler was ringing the gong every time, all too easy. Really it was a laser beam.

The 210 Berger, which is much more "accurate" at 100yds, was missing half the time. They were near misses, but misses none the less.

Any idea's how this all works out?

Is it a "bullet go to sleep" thing?

I am honestly lost on how a much more accurate load, that is such a higher quality bullet, can be all over the place, while the "factory seconds" ballistic tips were 100%........

Please advise......

Thanks
Dave
Are you shooting a round gong?

Are you consistently shooting .2” groups at 100 with the Bergers or was this a one time incident?

What was your ES?

Does your precision show more vertical than horizontal at 100 when shooting groups?

Where I’m going with this is if you have “ranging” errors you are more apt to miss a “round” target than a square target. A good group at 100 means little if all your error indicators are running up and down.
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  #7  
Old 12-06-2013, 01:08 AM
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Re: Strange accuracy at LR-Thought?

Quote:
Originally Posted by MMERSS View Post
Are you shooting a round gong?

Are you consistently shooting .2” groups at 100 with the Bergers or was this a one time incident?

What was your ES?

Does your precision show more vertical than horizontal at 100 when shooting groups?

Where I’m going with this is if you have “ranging” errors you are more apt to miss a “round” target than a square target. A good group at 100 means little if all your error indicators are running up and down.

Yes the groups are the same each time, wind allowing of course.

ES is off the top of my head about 30fps? Nothing severe.

Yes the gong was round.

I guess I need to shoot paper to see what "group" looks like at that range.
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