New .308 accuracy issue

[mcharger440]

Howdy guys I've got a kunundrum on my hands. Just rebarreled my savage 10 with a shilen 1:12 30" barrel and I've got an swfa 10x42m scope that has always tracked perfect so I don't think its the scope. I'm shooting hornady 178 hpbt over 43.5gr of varget in federal brass that's neck sized @ 2760fps this rifle will NOT group @200 yds were talking 3-4" but at 675yds and 710yds no problem ringing the bell EVERY shot. Has anyone ever seen this before... I'm lost...

 

[justgoto]

http://www.longrangehunting.com/forums/f19/applied-ballistics-shoot-thru-target-challenge-144359/

 

[mcharger440]

Well that's intriguing