sage heres a unit,this ones in brass,they come in steel too,i sell both.
i could post lots of pictures of finished shells,but heres a few to give an idea of what you can achieve when using one.
rem 10ga loaded in typical average joe fashion on a mec steelmaster
after (10ga bn4)
more 10ga once fireds (10ga bn4)
12ga new final crimp no taper mec jnr
run straight under a gaep bn2
in response to grhd ,using gaep crimp finishers helps beginners or experts alike to be on a level field with their shells.no need to struggle with final crimp settings which causes consternation and is a pain in the rear-(isnt that enough reason to own one in itself?.. ), likewise a guy with a lee load all can turn out a shell that looks better than a p/warren and most factorys too.
powder burn is optimal-increased burn rate= consistency throughout in pattern/velocity/load uniformity
no more "springing up"of crimps when left overnight experienced by loaders of certain presses/loads
10%less powder in some loadings for equal velocity or slight increase over conventionaly press loaded shells.,there are no negative effects on hulls affecting re loading other than than the usual self destruction caused by repeated use.