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140gr Barnes TSX

 
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  #1  
Old 07-22-2013, 11:47 AM
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Join Date: Jul 2013
Location: Bozeman, mt
Posts: 10
140gr Barnes TSX

Been running these bullets for several years but took the range this weekend and the load had opened up to around 1 1/2 inch groups. Switched over to a 140 gr Barnes TTSX and the world returned to normal. The gun shot a 1/2 inch 2 touching a the third a breath away group. Which is its normal group and has been for years, but with the other Barnes bullet. Has anyone had their gun change what it likes to shoot? Everything has remain the same. Primer, powder, brass, seating depth...
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Old 07-22-2013, 12:48 PM
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Join Date: Sep 2011
Location: West Wendover, NV
Posts: 196
Re: 140gr Barnes TSX

I don't know about the 7mm bullets, but I know on the 270 130gr TSX's they changed the shape from a secant to tangent ogive a few years ago, and consequently I had to change the seating die, because the new ones seated deeper. Possibly this happened to you, and the seating depth is off?
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  #3  
Old 07-22-2013, 01:15 PM
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Join Date: Jul 2013
Location: Bozeman, mt
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Re: 140gr Barnes TSX

Good point. Didn't know of the change
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