I loaded up some .25CM with H4350, R26, and H4831sc and conducted a broad ladder test. I choose to then test potential nodes. Below is the data. R26 didn’t gain much over H4350 so I excluded it.
Edited to add: Peterson 6.5CM SRP Brass, .281 bushing, trimmed to 1.910, CCI SRP, 28” Bartlein with...