Personal preference and experience plays a big role here, beng standard size, weight, and build relative to my height, I personally find the A3/A3 McMillan style comfortable for heavier long range rigs where prone shooting is the predominant position. For lighter weight carry rifles where a variety of shooting positions are encountered, I found the standard straight combed pistol grip style sporter stock on my 60's vintage, pre-64 Model 70 to fit and handle like it was an extension of my body. My more recent Super Grade Model 70 Winchester is quite similar. I'm sure this is the result of a few decades of use.