I had to test a dozen or more lots of SK Rifle Match to find a lot good enough to buy in quantity, but when I did finally find it, I bought two cases of that good lot, and am still impressed with how well it shoots at 50yds. Had the same experience with Lapua Center-X, and nearly gave up spending $10+ per box looking for something worthwhile. Again, when I did find a good lot (actually, Daniel at the Lapua Test Center found it), I bought in quantity, and haven't had reason to regret it. Seemed odd to me that none of the Midas+ Daniel ran through the Krieger on my V-22 shot even as good as that good lot of Center-X, but I'm not complaining - Midas+ is nearly $5/box more expensive.
Accuracy with SK Pistol Match (not the Special) has been more consistent, with four of six test lots shooting quite well for me. However, that's at 50yds - Rifle Match typically does better at 100yds.
The first time I tested the new SK LR Match, four out of five lots were pretty much crap at 100yds, but the last one of the five lots was very good, running neck-and-neck with the good lot of Lapua Center-X, yet having higher velocity and priced $2.50/box under the Center-X. I go back-and-forth with these two lots of Lapua & SK - one time, the LR Match is better at 200+yds, next time, it's the Lapua that is better. If I kept good records of the way they shoot in different conditions, I might be able to figure which one does best in what conditions - or maybe it's just me?
I'd played with numerous lots of SK Std+ for several years, but had never gotten very serious about lot testing with it. However, early this spring, I bought 2-box samples of five lots of it, and found what I consider to be an exceptional lot. It was good enough to convince me to buy a case of it, and it's shot pretty darned well out of several rifles, including those with Bartlein, Benchmark, Krieger, Lilja, & Shilen customs, all with EPS chambers. My CZ 457MTR also likes it. At less than half the cost of Center-X, what's not to like?
I do get tired of lot testing, especially after doing quite a bit of it. But OTOH, it's a great excuse to get rifles, rests, targets, & chronograph out and go do some shooting with the potential of having productive results.