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I have heard that some 7mm 08 do not like the 139 gr bullet

This twist 1in 10 shot long 120s great (Barnes) but seems not to like the shorter 139, I guess I should try a bullet at least as long as the 120 gr cooper bullet

any suggestion on this matter will be appreciated
 

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All of my 7-08's have had 1:9-1:9.5 twist rates, and would stabilize any 7mm bullet up to 175gr out to 300yds. I find it hard to believe that a 1:10 would be a problem, as the .308 and .30-06 will stabilize bullets of similar ballistic character out to 1000yds, or more. The 7-08 can push equivalent bullets as fast as the .30-06, and faster than a .308.

It is possible your barrel doesn't like the 139gr bullet(s) you have tried so far though. My current 7-08 shoots 140gr Sierra's under a quarter at 100yds, and won't shoot my favorite 139gr Hornadys for poo. And I have tried. My .35 Whelen shoots 225gr Sierra's like a good varmint rifle, and won't shoot 225gr Nosler Partitions to Minute of Paint Can. I almost cried.

Ya never know.
 

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Longer bullets need more twist to keep 'em pointy-end first. You've enough twist for the 139s. Though they mustn't be loaded right for your gun.. I'd probably avoid 180gr bergers.
 

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Your rifle may not like that brand of bullet not so much the weight/length, try another brand. My 7-08 (1 in 9 1/4) does not like the Hornady 139 but shoots the Serra 140 just fine.
 
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