Recently purchased an LSS to drop my factory barreled R700 AAC-SD, .308, 20" 1:10 twist in...gun has always been a fairly decent shooter. Has a SWFA 3-15 on top and initially had low rings and here is where i ran into small problem 1: w/ a collapsible AR15 butt stock i could not get the scope far enough back to have a comfortable length of pull and a full sight picture...this also made it difficult to get a solid cheek weld even with a riser because the scope was so far forward...didnt like that style stock on my bolt gun (didnt think i would but tried it anyways) so i switched to the fixed mako sniper (on sale from optics planet for like $150 shipped so i choose it over the PRS)...switching to this made the length of pull perfect for me (im 6'5") but again scope was no where near far enough back so i decided to try a 1 piece offset mount and reverse it...local gun shop only had a HIGH mount but it fixed my eye relief problem to where i can now shoot it comfortably and the high optic isnt a big deal since i can adjust the cheek piece and just account for the scope height in my ballistic calcs. Ended up looking like this and weighing 12 lbs with mag and bipod...ill probably change the mount to a lower one eventually just because i prefer the looks...
the 2nd issue i ran into was shooting known loads for this rifle, i would have random unexplainable flyers, some off by as much as 2" @ 100 yds...tried 3 different loads i have ran before (178 amax, 155 amax, and 165 game kings) and same problem with every one...rechecked all my loading setups and rechecked all my torques on action and optic and tried to work a few new loads but had the same problem...took it all apart and found this
the adjustment screw from my timney was hitting the chassis in the trigger guard area...my trigger is not set super light and i can back the screw out multiple threads and it will still function fine (no pull gauge) but it wouldnt even fit in the chassis with the pull lightened...the action would rest on the recoil lug and the small adjustment screw and not seat into the chassis. no big deal really, just chucked up a milling bit on my press and notched it out so i have decent clearance now and took it back out to the range shooting the same loads
Much better results...shot 2 5 shot groups @ 100 yds w/ 155 amax, 1st at the diamond, and 2nd at the upper dot, using the built in monopod on the mako stock...both were inside 1" (zero'd calipers on bullet hole and measured total spread)
really consistent points of impact even with the 2 i pulled left in the bottom group and 1 in the top group
Overall i really like the LSS since i was going for small and relatively light weight...even though it was a bit of a headache at first...going to bed the recoil lug soon but for now its just dropped in. I do notice it is not as stable as my previous bell and carlson (big and heavy), but i would never have expected it to be since it weighs half as much...i have to be a lot more careful, and not put any pressures on the rifle while executing the shot because being lighter and smaller, its more sensitive to small movement from me.
Just thought id throw this info out there if anyone was wondering about the chassis and if anyone ran into similar problems.
the 2nd issue i ran into was shooting known loads for this rifle, i would have random unexplainable flyers, some off by as much as 2" @ 100 yds...tried 3 different loads i have ran before (178 amax, 155 amax, and 165 game kings) and same problem with every one...rechecked all my loading setups and rechecked all my torques on action and optic and tried to work a few new loads but had the same problem...took it all apart and found this
the adjustment screw from my timney was hitting the chassis in the trigger guard area...my trigger is not set super light and i can back the screw out multiple threads and it will still function fine (no pull gauge) but it wouldnt even fit in the chassis with the pull lightened...the action would rest on the recoil lug and the small adjustment screw and not seat into the chassis. no big deal really, just chucked up a milling bit on my press and notched it out so i have decent clearance now and took it back out to the range shooting the same loads
Much better results...shot 2 5 shot groups @ 100 yds w/ 155 amax, 1st at the diamond, and 2nd at the upper dot, using the built in monopod on the mako stock...both were inside 1" (zero'd calipers on bullet hole and measured total spread)
really consistent points of impact even with the 2 i pulled left in the bottom group and 1 in the top group
Overall i really like the LSS since i was going for small and relatively light weight...even though it was a bit of a headache at first...going to bed the recoil lug soon but for now its just dropped in. I do notice it is not as stable as my previous bell and carlson (big and heavy), but i would never have expected it to be since it weighs half as much...i have to be a lot more careful, and not put any pressures on the rifle while executing the shot because being lighter and smaller, its more sensitive to small movement from me.
Just thought id throw this info out there if anyone was wondering about the chassis and if anyone ran into similar problems.
