The recommended fix for the crumpled HS(horse-s...) shells is found on both the Winchester and MEC sites. The crimp starter should be lowered until the opening in the crimp started shell is smaller than a wooden pencil. The problem is that the shell walls are relatively soft and if the crimp folds are not folded in far enough, the walls will be crumpled in the first crimp station, rather than folding together, as they should.
My press (Hornady Apex) already is. It makes no difference on mine for HS AA results but will affect other hulls that I reload. The powder/shot wad still will catch on the lip of the base wad 10-20% of the time and crunch the shell (even tho the crimp will look better). The crimp refuses to stay down on these regardlss of how much pressure is applied.
For my own work I will stick with the cache of old orginals that I have left and use another maker's procduct that suits my needs better and gives me no problems.
The new/hs 12g AA hulls arern't worth the trouble to pick off the ground.
