i spent time comparing presses. price, conversion cost, ease of use, yada yada, including going to a friends and using his 550. that 550 was one sweet machine, but, i load 4 calibers - pistol, and all the work and expense of the changovers made my head hurt. i settled on the LnL AP and have not looked back. it runs sweet too and caliber conversions are simple. had i the money, i would love to have a half dozen 550s set up on a long bench. having that kind of bucks would afford all factory rounds and leaving the brass for some lucky scrounger. naah, bucks be damned, i would still reload. sitting at my bench, pulling a lever, sipping coffee, listening to music, and boxing all that beautiful ammo. the problems of life are gone temporarily, and i come back to earth refreshed. i have since came across an older Hornady progressive really cheap, not LnL, but, it is dedicated to .357, so, no changeover probs. it runs slick too. this is just my experince YMMV. setup of any progressive can be tejious. be patient and follow instructions faithfully. happy shooting in this new year.