i try to keep 6 to 10 different lots of eley and sk/lapua on hand. i got tired of buying center x, midas, eley match, tenex, ect and not being able to count on it due to differences in atmospheric conditions. i swear RWS R50 was the worst for me. shot horrible in my CZs and anschutz, then i gave a box to a guy with an anschutz 54 bench rifle and it all went though the same hole. just my luck. anyway, so now i take a few boxes of everything with me, and doing that one of them will usually shoot. even lot tested stuff will have its off days. the lapua pistol stuff is on sale quite a bit, so i usually run some of that since it can be found under $10 box. then assorted sk magazine, rifle match, and pistol match. eley club has been pretty consistent for me over the years, better than match or tenex so i usually run some of that if i want some eley.
i recently used the eley lot analyzer and ordered a batch that shot really well in all four test barrels. i have had a few good groups out of it, but it hasnt been as well as i have hoped it would be. i thought i would give it a try. i have had some very good lots of team/match in the past, but it has been luck of the draw and depending on conditions it would either shoot awesome, or be all over the place. it was never much in between compared to my lots of eley club and sk/lapua stuff. just my $.02. YMMV