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7mm rsaum load data for 1000 yd.

 
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  #1  
Old 12-13-2007, 07:01 AM
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Location: riverview,Fl
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7mm rsaum load data for 1000 yd.

anyone shooting this cartridge and 168 or 180 Bergers? I/m getting excellent accuracy with the 180,but the velocity is 2800fps,I/ve got a 28" barrel,seems there's not much data on this round.My load is 57 grs. H4831sc. Thank's
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Old 12-13-2007, 01:37 PM
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Join Date: Jan 2006
Location: Nebraska
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I just finished mine, put the DE brake on yesterday. I have fired a total of 5 rounds for barrel break-in and not at a target so I am not much help yet.
I am planning to shoot the 162 A-Max but did pick up some 180 Bergers to compare. I am going to try H-4831sc with the 162s but think H-1000 may be better with the 180s.
I plan to do some development soon but it's hard to get excited about it when it's 17 degrees outside.
I have been hearing from others that they are getting 3000fps with the 180s but that is with a 30" barrel, mine ended up at 27 1/2".
I'll update if I get any data.
James
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  #3  
Old 12-13-2007, 08:52 PM
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Location: riverview,Fl
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Your probably right,I think 4831 peaks too quickly with the 180,I/ve tried RL-25,but accuracy wasn't there.Maybe I/ll try the H1000,if it works out I/ll let you know.The 168 Berger states b. c. of .648 the 180 .684.Maybe best to get someone with Quickload program to run the numbers and find out.Thank's,Archie
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  #4  
Old 12-14-2007, 02:09 AM
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Retumbo

Hi try Retumbo I use it in my Model7 it has a 22" brl and it gives the best velocity and extreem spreds with 160gr+ projectiles .

H1000 is a close seccond I am building a 7mm saum for F Class shooting to 1200yards and it will have a 3" Lawton 8 twist cut barrel and it will be using Retumbo and 175gr Sierra's and 200gr Wildcats.

Cheers Bill
Australia
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  #5  
Old 12-14-2007, 11:16 AM
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Location: North Idaho
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+1 on the retumo best powder for 7mm and heavy projectiles.
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