Why so many?
.
There is no "ONE SIZE FITS ALL".
To get adequate results in all these calibres, I would have to go with 4895 or 4064, leaning toward 4895 if I had only ONE POWDER to choose from.
However, to get the BEST results from each rifle, I want to have a more adequate selection of powders available. We have three different .223s that perform best with three different powders and bullets.
If we were limited to ONE, we would all be eating Macdonald's hamburgers, driving Ford cars, and, worst of all, would only be allowed to drink ONE bottle of beer. However, one wife seems to be adequate for most of us.
.