Picked up one of the rem 700 SPS sporter ADL's in 223 about two months ago from wally world. Because of all the panic buying I have not had the chance to run any factory 55's through it but have shot a bunch of 55gr. nosler varmagedon and hornady v-max handloads through it.
The noslers are grouping in the low .6's over BLC-2 and the hornadys are in the mid and low .5's over BLC-2 also. once everything returns to normal and I can restock my stash of benchmark powder I will be giving it a try.
Also I did float the barrel, adjust the trigger, and bed the recoil lug as soon as I bought the rifle. Rifle shoots federal american eagle 50 gr. ballistic tips in the mid .7's.