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5R or 4R

 
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  #1  
Old 07-25-2012, 06:42 PM
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5R or 4R

I built 2 customers 2 guns just alike except for the barrel. One was a 4r the other a 5R. These guns are chamberd in 7/300 wsm. The 4r would shoot the 160 Accubonds, the 5R would not. Has any one had trouble getting the accubonds shooting in a 5R. Both would shoot the 180 Bergers or the 168 Bergers. The 168's were a one hole group, the accubonds were 1 1/2 inch at least. Just thought I like to here if anyone else had this problem. Dan
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  #2  
Old 07-26-2012, 09:29 AM
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Join Date: Apr 2010
Location: Allen, TX
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Re: 5R or 4R

Very interesting.
I sure don't have any answers.
But, the following questions come to mind...

???
- same reamer, throat, headspace
- same barrel mfg, twist, length, profile
- same action, stock
- same batch of brass, load, dies, etc...
- same shooter, rest, etc

Were they chronied? And, how did that compare?

Did the same person develop the loads for each rifle?

Or, were the loads developed in one rfile, and then shot in all?

-- richard
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  #3  
Old 07-26-2012, 12:46 PM
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Re: 5R or 4R

The barrels were the same twist, 5 contour,fluted,finished at 26 inches. They were a different mfg. I did all the load work shooting etc. The 4R was a little faster than the 5R. The guns had the same Stocks, Action, Trigger, Bipod etc. The only differance was the brand of barrel. Loads were developed for each rifle. Dan
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