Here's my confession. I load .223 with 50 Sierra BKs and Benchmark powder for prairie dogs. After a disappointing day at the range (Who knows why?), I started obsessing about ways to improve my groups; a friend suggested I try heavier bullets, say in the 65gr range. So I embarked on a hunt for the best bullet and best load. A friend gifted me 3 different bullets. 60, 63 and 65 gr, which I loaded with Varget. The 63 shot best, a Sierra 63 gr SMP. Other friends and acquaintances thru THR suggested different powder so I end up with about 15 different loads with 3 different powders. Then it's off to the range to try my new loads. I shot from a lead-sled type rest to remove as much shooter error as possible. Between each set I pulled a bore snake thru the barrel. I shot 45 loads (15 groups of 3), thinking I would narrow it down to the best 2=3 groups then load more of each to tweek the final load. At the end of this session, I needed to shoot a few of my original 50 gr Sierra BKs with Benchmark in preparation for a prairie dog shoot later this week. They shot significantly better than any of my experimental loads! I shot a 5-round one ragged hole group at 100 yds. All that effort to learn I already have a terrific load (smack self in forehead). Sound familiar??