Right before deer season last year some kind soul left me 40 Hornady 45/70 empties in the brass box at my local shooting range. When I started to reload them I was surprised at how much shorter they were compaired to the WW brass that I usually use. Just to keep things streight I load a seperate load in the Hornadys from that I load in the WWs. Other than that I haven't noticed any difference in the way they shoot. I might be wrong but the Hornady brass seems a tad heavier than the WW.
RJ