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Load development made easy.

 
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  #15  
Old 07-30-2009, 04:01 PM
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Location: Arvada, Colorado
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Re: Load development made easy.

Hi Michael,

I noticed on your 46.0 load your Extreme Velocity Spread was 20 fps. I realize it was only 3 shots and 2 were the same velocity and one was 20 fps higher.

As awesome as that group you shot was, how will that load work at lets say 1k (Vertical Spread)? I only ask this as I have been told that one would like to have ES in the single digits if possible.

This may be a dumb question but I am trying to learn.

Thanks,
Ray
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  #16  
Old 07-30-2009, 04:02 PM
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Re: Load development made easy.

Michael, I don't have the info on me at the moment for all my loads but the 85.5 grain load had an average muzzle velocity of 2943 .

bigbuck
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  #17  
Old 07-30-2009, 06:24 PM
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Re: Load development made easy.

Quote:
Originally Posted by SHRTSHTR View Post
Hi Michael,

I noticed on your 46.0 load your Extreme Velocity Spread was 20 fps. I realize it was only 3 shots and 2 were the same velocity and one was 20 fps higher.

As awesome as that group you shot was, how will that load work at lets say 1k (Vertical Spread)? I only ask this as I have been told that one would like to have ES in the single digits if possible.

This may be a dumb question but I am trying to learn.

Thanks,
Ray
20 FPS with this load would "theoretically" be 4-5" high or low for a 20 FPS extreme spread. Good harmonics also come into play here. While at 1K harmonics cant completely make up for the extreme spread, they do help quite a bit. It is common still to see 1/2 to 1 MOA groups at 1K even with more than 20 FPS spreads IF the harmonics are right. 20-25 FPS really is managable. Single digit ES's are nice but not always attained. One year I was working with Federal GMM ammo and found the ES to be nearly 60 FPS yet the ammo held 1 MOA out to 1K and much better at 700 and 800. The "theoretic" horizontal component was more than the groups were large. Then again, Federal GMM is a known "sweet spot" for the 308.
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Originally Posted by Broz View Post
Please just answer one very simple question. Why would anyone shooting long range load a low BC , low SD 168 gr offering in a 300 win???????

My answer to this is. The only reason is to make the 7 RM look good. There is no other reason.

Jeff.
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  #18  
Old 07-30-2009, 06:26 PM
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Re: Load development made easy.

Quote:
Originally Posted by bigbuck View Post
Michael, I don't have the info on me at the moment for all my loads but the 85.5 grain load had an average muzzle velocity of 2943 .

bigbuck

Have you loaded them up to 3200+ or have you stopped at 85.5?
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Quote:
Originally Posted by Broz View Post
Please just answer one very simple question. Why would anyone shooting long range load a low BC , low SD 168 gr offering in a 300 win???????

My answer to this is. The only reason is to make the 7 RM look good. There is no other reason.

Jeff.
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  #19  
Old 07-30-2009, 07:46 PM
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Join Date: Aug 2008
Location: Arvada, Colorado
Posts: 358
Re: Load development made easy.

Thanks for the reply! It seems I have been a little to fussy
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  #20  
Old 08-03-2009, 02:07 PM
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Join Date: Feb 2009
Posts: 154
Re: Load development made easy.

Hey michael,

just curious, do you do your load development the way you would shoot in the field? i.e. off a bipod or off a front rest, bag etc??
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  #21  
Old 08-03-2009, 02:45 PM
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Location: The rifle range, or archery range or behind the computer in Alaska
Posts: 3,418
Re: Load development made easy.

Quote:
Originally Posted by Frogman77 View Post
Hey michael,

just curious, do you do your load development the way you would shoot in the field? i.e. off a bipod or off a front rest, bag etc??

That is a big yes. I typically shoot of the bench with a bi-pod and a small sand bag under the stock. I also shoot in the prone position off of the pod with my back pack under the stock. I do not use mechnical rests and rabbit ears.
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Quote:
Originally Posted by Broz View Post
Please just answer one very simple question. Why would anyone shooting long range load a low BC , low SD 168 gr offering in a 300 win???????

My answer to this is. The only reason is to make the 7 RM look good. There is no other reason.

Jeff.
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