Re: LMT .308 MWS
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Santo</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: elfster1234</div><div class="ubbcode-body">do you think it might have something to do with the fact you don't have a 1pc scope mount? was just wondering if that might make a difference? just and idea.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Griffin Armament</div><div class="ubbcode-body">I took my LMT MWS out for the second trip (this time with M118LR ammo). The Chrono said 8FPS SD 22FPS ES 2465FPS AVG.
I still had problems grouping the gun, with first groups in the 1.75MOA range. Bench rested bipod and sandsock and shooting the rifle with minimal input like shooting a .22lr bolt gun. I got the gun down to around 1.2MOA when I gripped the rifle like a pistol, pulled it in like a shotgun and really worked at it, and I left the range feeling unimpressed and wanting to further trouble shoot it.
The 7/8" circle targets I plan to replace with squares so I can hold a corner rather than trying to di-sect a circle slightly larger than the reticle width.
I got back to the shop and realized the bi-pod had shot loose. I decided to move that 2" forward and also tighten it down hard.
I removed the flash suppressor which has a small aperture near the muzzle and tested the barrel thread for concentricity in relation to the bore. It was .002-.003" out. So I decided to swap it for a brake in hopes of mitigating as much as possible the potential effects of eccentric aperture and high pressure gas on bullet flight.
I switched the nice looking MIAD std rear grip plastic for the big honking anatomically correct rear plastic.
I experienced failure of the trigger to reset twice (requiring me to push the trigger forward) probably on account of the OEM hammer spring and disconnector spring, so I swapped in the JP disconnector spring which also reduces the load for the trigger spring and that solved that problem trigger reset was notably more positive.
I decided to drill and tap the receiver for an overtravel screw in an effort to save the $200 on an upgrade trigger group. That was a significant improvement in dry firing- the sights do not move when the trigger breaks.
I also tightened up some rotational play in the stock with clear tape on the buffer tube, and ordered a .093" thick sheet of adhesive backed, A-scale 30 durometer neoprene from McMaster Carr to help with stock weld. The charging handle has ~.12" of clearance space over the stock so this should be compatible in all positions.
I'm hoping to get back to the range Thursday and see the rifle shoot better. Under 1MOA all the time is acceptable accuracy IMO with M118LR. Anything over 1MOA doesn't make sense with a 16" relatively heavy barrel and match ammo.
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My LMT also had lousy groups, 3+" 5 shot groups @ 100 yards out of the box with 168 gr SMK's until I took the barrel out inspected and retorqued it. Still doesn't shoot groups as well as my DPMS SASS. I am not very impressed with LMT's QC. The rifle also had a half dozen nicks in the finish. I think LMT has gotten to complacent lately. My older LMT 5.56 QCB was pefect out of the box a very accurate. </div></div>
I have this exact gun and just had this exact issue. The 175's do not stabilize within the first 300m out of these 16" barrels. They are, however, moa or better at 400+. Have someone else shoot the 175s at range and observe the trace to confirm. Mine was 1.5+ with an active sf operator behind the trigger at 100, but I could ring 6" steel at 700+ consistently.
