I am referring to formual that produce numbers for comparrison - those numbers don't seem to work - for me, anyway.
I know that high velocity seemingly kills some game incredibly fast, lightening fast in fact, while heavies kill them slower. Used on another animal on the same hunt even, the fast one takes a big back seat to the slower, heavier bullet in killing power while at times, they seem to switch places - the various formulae do not provide any concrete or dependable data for me to process all the time.

FPE has become,for me, largly a laughing stock especially when applied to large bores and round balls- whether they are shot from modern-type double rifles of bore size, or muzzleloading rifles.

Perhaps ctgs. need to be segregated into 'classes' or 'categories' wherein specific formulae work? Too, classes of animals and categories of them would also have to be matched to the various formulae - makes my head hurt just thinking of it.

I'd rather just go big and slow and be done with it as I know it will work.