Paul 105--Thanks for sharing your load info. I started using 8.0g of Green Dot and 429421 sized .429 and they kept jumping crimp. In fact, nearly all cast boolits I tried jumped crimp unless they were less than 225g or so in weight. I then reduced the expander ball in my Dillon Square Deal B to .423 and that problem went away. I kinda attributed my gas shield cutting to a faster powder like the Green Dot, so I switched to 2400 or WC820 and I think that has helped. My current carry load is 18.0g of 2400 and a 225g 429244HP that has been scalped to achieve that weight. I haven't chronographed that combo yet, but, based on other 4" Smith 629's, I'd guess the velocity is somewhere between 1050 to 1150 fps.