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Am i doing something wrong?

 
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  #1  
Old 10-05-2008, 10:36 AM
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Am i doing something wrong?

I have been loading for my 7 mm STW for about 2 years now and have had decent success with the 140 accubond, 140 tsx and the 160 accubond. All around 3/4". The 160's the first time out i used 79grains of H-1000 and got the gun to group under 1/4" at 3212 fps I thought finally found my load. Went home loaded up 20 not changing a thing. The last to times i have gone out to check zero for a trip and could do any better than a hair over 3/4" I havent changed anything i am aware of. What the heck am i doing wrong?
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Old 10-05-2008, 12:36 PM
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Re: Am i doing something wrong?

I have found that this has happened to me in the past. It is indeed very frustrating. I have found that more often than not mine was caused by a difference in temp. I don't know if this is the reason why, but that is the only variable(that I am aware of) that changed from one firing to the next. I have found that I have even loaded 50 or so at one time and went out and one day they shoot .3-.4 and then a couple of weeks later, they shoot .8-.9. same load, loaded at the same time, same set up and everything.
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Old 10-05-2008, 02:19 PM
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Re: Am i doing something wrong?

"... got the gun to group under 1/4" at 3212 fps I thought finally found my load. Went home loaded up 20 not changing a thing. The last to times i have gone out to check zero for a trip and could do any better than a hair over 3/4" I havent changed anything i am aware of."

Doubt you are doing anything "wrong", you just fired more rounds and have gotten a more true picture of what your rifle and loads are capable of doing on a regular basis.

The 1/4" groups would make you competetive in a formal Bench Rest match against rifles with custom actions and triggers with expensive custom barrels while firing custom bullets and using 36X scopes. Doubt your STW is capable of that except for an occasional random group. And I KNOW no hunting bullet is consistantly capabile of that kind of grouping.

I think your 3/4" accuracy is really GREAT for a truly high powered hunting rifle and ammo! Smile a lot and don't worry about it.
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Old 10-05-2008, 02:58 PM
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Re: Am i doing something wrong?

Quote:
Originally Posted by boomtube View Post
"... got the gun to group under 1/4" at 3212 fps I thought finally found my load. Went home loaded up 20 not changing a thing. The last to times i have gone out to check zero for a trip and could do any better than a hair over 3/4" I havent changed anything i am aware of."

Doubt you are doing anything "wrong", you just fired more rounds and have gotten a more true picture of what your rifle and loads are capable of doing on a regular basis.

The 1/4" groups would make you competetive in a formal Bench Rest match against rifles with custom actions and triggers with expensive custom barrels while firing custom bullets and using 36X scopes. Doubt your STW is capable of that except for an occasional random group. And I KNOW no hunting bullet is consistantly capabile of that kind of grouping.

I think your 3/4" accuracy is really GREAT for a truly high powered hunting rifle and ammo! Smile a lot and don't worry about it.
Thank you i was kind of thinking that. You helped put my mind at ease.
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Old 10-07-2008, 09:14 AM
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Re: Am i doing something wrong?

Quote:
Originally Posted by shootinfool View Post
I have found that this has happened to me in the past. It is indeed very frustrating. I have found that more often than not mine was caused by a difference in temp. I don't know if this is the reason why, but that is the only variable(that I am aware of) that changed from one firing to the next. I have found that I have even loaded 50 or so at one time and went out and one day they shoot .3-.4 and then a couple of weeks later, they shoot .8-.9. same load, loaded at the same time, same set up and everything.
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Had i wrote a reply sooner it would have said ^^^^ these same words.

This has been very irritating to me also ! right up there w/ my rifles changing point of impact..Top quality stocks-rings-scopes -barrel ---still nothing works the same day in day out.
I pondered it all many many times and am at a loss w/ both.

It's like Joe Dirt's dad says how does a posi-track in a hemi work --it just does--..
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Last edited by ol mike; 10-07-2008 at 07:51 PM.
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  #6  
Old 11-23-2011, 08:15 PM
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Re: Am i doing something wrong?

Look for the most forgiving load in your ladder testing, not always the tightest group.
Everyone goes through the results you described at one time or another with normal
or light barreled guns.
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  #7  
Old 11-23-2011, 08:45 PM
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This is why I shoot 5-shot groups. They're bigger than 3-shot groups, but also more consistent. For hunting rifles, I shoot the group over a 60-minute span. If I had the time, I would shoot 10-shot groups.

Sounds like your 7 mm STW is a good shooter, even at 3/4". FWIW, I only have one or two rifles that can produce groups smaller than that. Below 0.5", my technique is the limiting factor, so I'm not sure how well they really can shoot.
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