Didn't want to sidetrack the existing threads.
Even if I wanted to choose I couldn't, the estate has decided so fibre it is. Consequently, I've been doing my own thing for years having reached a plateau on which I'm happy. I have a bookcase containing much good information which was somewhat of a necessity 40 odd years ago, but not read now and the only "magazine" I take is PW. Because I have an interest, the only thing outside of PW I keep an eye on is any writing concerning patterns/testing and particularly that work of the BASC. However, in the case of the latter this is stagnant and as far as I'm aware non existent elsewhwere, but particularly with regard to Gauss or what the Americans call 'central thickening' This phenomenon has been touched upon in one of the current threads but without ackowledging any reason.
As no one has ever really mentioned this on PW, and in view of the current debate about the patterning characteristics of the two wad types, what is the latest published information on how to assess cartridge performance patternwise or, in fact, are we still using information published in the 1930s? Certainly, I've seen nothing current. Has anyone spotting anything relating to the above phenomenon to which all cartridges are subject?