How many do you shoot for load testing?

[Blue Avenger]

Many Benchrest shooters will only shoot 3 shot groups when tuning loads. I also shoot 3 shot groups when tuning a load. I know I got a good load when all three shots go into the same hole, and you can not tell where one bullet entered from another. As they say 3 shots proves the load, 5 shots proves the shooter.

same here, by the second shot you already have a clue.