I think if you can develop your own throttled down load, that's the best way to approach reducing the power of a larger chambering. My experience with factory-made "reduced recoil" loads has not been good. Remington's version for a 300WM literally tumbled from a Rem 700 and Hornady's version (I think it was called Hornady Lite?) was all over the place in a 7mm-08 that grouped multiple, full-power loads well. A sample size of two might not be the best way to decide, but the reduced stuff is generally scarce and thus very expensive... I'd want to know for sure how it was going to group before investing in multiple boxes.
I don't doubt your experience and observations. But the Hornady Lite .243 loads shoot under a MOA in my sons' Wby Vanguard, and the Hornady Lite 300 WM loads shoot under a MOA in my 1990 Remington 700 BDL.
