j.peace Posted July 20, 2014 Report Share Posted July 20, 2014 (edited) I recently assembled my first lr-308. I have assembled a few ar's with no issues all three ran around 1 to 1 1/2 groups at 100 yds.On Bipods. Not the case with my 308. Before ordering parts I knew accuracy is a must so I sprung for the mega 18" guaranteed sub 1 moa at 100. Before I got my scope in I sighted in with mbus sights. 4" groups was my best. I thought it was me and I needed a scope. So I put a brand new redfield battlezone. 3 x 9 x 42 and for a base I used a nikkon m-223 1 piece mount. The scope has bdc for 168 gr. Bullet. I ran PMC 145 gr. And winchester 150 gr. Both with same results. I also ran a bore snake through a few times between mags. It seemed the first couple were very tight after allowing to cool. Then as it got hotter the poi would shift. I really don't think its the scope because same results were seen with open sights at 50 yds. I also triple checked scope mount bolts for torque . It is possible that my barrel nut may be a little loose the holes aligned up at 30 lbs of torque even after loosening and tightening it several times. But my free float rail won't move by twisting it by hand. And there is some play between upper and lower. Tomorrow I will remove rail and gas tube and recheck barrel nut torque (several times I'm sure), and I have an extra wedge so I'll put that in. And I will also try and run down some heavier bullets pref. 168 gr.and I will try it again at 100 yds. And I known it ain't me cause I had no problems performing with the ar today. I was shooting a mag. Of 308 then a mag of .223 rotating back and forth between weapons on different targets. 223 2" groups all day long. .308 4" the best prolly closer to 6" Again it seems the poi is moving. A coople or three will be close then poi shifts. Please help. This is my first .308 and I'm very proud of it and I know its capable of performing better. Any ideas or help is very appreciated You guys have helped me make sure I ordered the right parts. Please help again and let's make this thing a heyholer!! Edited July 20, 2014 by j.peace Quote Link to comment Share on other sites More sharing options...
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