Hey everybody. Trying to work up a load for the 6.5 grendal AR-15 and have become frustrated. I have palmetto upper with 18 in barrel and have been using cfe223 and 123 gr sst bullets and have now almost used a whole box trying to get something to work. So many other posts in forems on this combo doing well with the grendal. Im not new to shooting or reloading. Im now skeptical of maybe lemon barrel or bore issues. I shot one good group 1/2 moa at 100 yd with 31.5 gr thought i had the load went and made some more up and now its all over the place. Tried diff grains and seating depths. Any help would be appreciated.