I have a remington sps in .308 it has a timmney trigger set @ 1 lbs and it is in a aics 1.5. At 400 yard I can shot a 5 shot group 1.25" however, at 600 it spreads out to 5-6 inches. Conditions were perfect no wind low humidity and clear. what do I need to do? Oh yeah the load 168 gr sierra 42gr n150 in lapua brass. Any and all help would be great.
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