Equismith, What's your experience been like with the 600Jr in 410 bore? I've been toying with the idea of loading the little pipsqueak. The majority of my small game hunting for the last few years has been with the 410 and 28. I still have many boxes of factory shells left, but I like to experiment and pattern loads. I have a couple hundred Remington 3" SP hulls, a hundred or so Win 3", and about 150 2 1/2" Rem Game loads. Any problems at all getting good crimps with the Jr, or with hulls buckling. Good hunting and good luck.