I can't see it working at all, I see it causing way more tail chasing than anything unless you're really lucky.
Experience has taught me I need a minimum of 4 shot groups during load development to tell if a load is worthy of revisiting. 4 shots tight usually repeats. 3 tight is blind luck many times. That's assuming the bbl is fouled with said powder and bullet...
^^^
5 shots has never revealed anything that 4 shots had not already revealed but 4 shots has revealed things that were not evident in the 3 shot group