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280 AI replacement for 270 Win.

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  #64  
Unread 03-15-2010, 12:54 AM
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Re: RL-17 in 280 RCBS Data

One last tidbit of info on RL-17 powder and my 280 RCBS Improved. I was at the range chronographing again today.

The ES and SD are too excessive for LRH. Shot 4 rounds at 54.4 grains RL-17 with 168 VLDs and Fed 210M primers.

Average MV = 2940fps
ES = 58
SD = 25

I'm giving up on RL-17 in this rifle. I think I'll be using H1000 or Retumbo. Retumbo gives the best velocity but the ES & SD is running higher than with H1000.
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  #65  
Unread 03-15-2010, 04:07 AM
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Join Date: Jul 2009
Location: Salmon, Idaho
Posts: 392
Re: 280 AI replacement for 270 Win.

All this talk about the .280AI has me frothing at the mouth for my next project.

Rem 721 Donor Action
Pacific Research Stock
Probably go with a Krieger barrel (but what twist?)

Would like to shoot 140-160 grn Bergers, AMaxs
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  #66  
Unread 03-15-2010, 04:37 AM
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Re: 280 AI replacement for 270 Win.

A 9 twist will handle the 180 gr Berger VLDs. Mine is a 9 twist and shooting the 168 Berger VLDs fine. I have not tried the 180 VLDs.

But a 1 in 10" twist is sufficient to stabilize the 168 VLDs according to Berger's web site.
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  #67  
Unread 03-15-2010, 05:19 AM
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Re: 280 AI replacement for 270 Win.

phorwath,
thanks for posting your info on RL17.
Have not tried it, but at this point I will stick with Retumbo.
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  #68  
Unread 03-15-2010, 08:38 PM
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Join Date: Jul 2009
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Re: RL-17 in 280 RCBS Data

Quote:
Originally Posted by phorwath View Post
One last tidbit of info on RL-17 powder and my 280 RCBS Improved. I was at the range chronographing again today.

The ES and SD are too excessive for LRH. Shot 4 rounds at 54.4 grains RL-17 with 168 VLDs and Fed 210M primers.

Average MV = 2940fps
ES = 58
SD = 25

I'm giving up on RL-17 in this rifle. I think I'll be using H1000 or Retumbo. Retumbo gives the best velocity but the ES & SD is running higher than with H1000.
So you give up on a powder after four shots? Not very persistent are you?

-X3M
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  #69  
Unread 03-16-2010, 01:15 AM
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Re: RL-17 in 280 RCBS Data

Quote:
Originally Posted by X3MHunter View Post
So you give up on a powder after four shots? Not very persistent are you?

-X3M
You reach and post incorrect conclusions based on faulty and incomplete facts without much thought, don't you?
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  #70  
Unread 03-16-2010, 04:57 AM
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Join Date: Jul 2009
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Posts: 211
Re: RL-17 in 280 RCBS Data

Quote:
Originally Posted by phorwath View Post
You reach and post incorrect conclusions based on faulty and incomplete facts without much thought, don't you?
Maybe?

All I'm saying is that RL17 is working excellent for me in my 6.5 x 47 Lapua, it took a little load development to get it there, but when I got there I was really happy with the results. But my setup is way different than yours, so maybe what worked for me just wont work for you because of the case size difference.

-X3M
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