Jeff, if you are looking to produce very accurate loads, I think you would like the rockchucker press. It is obviously not designed to produce a large volume of loaded cartridges, but it will produce very accurate loads. I am sure there are other presses that will do the same job, I just happen to like the rockchucker because of its' design and functionability. If you look at the Hornady web site, you can see and/or order the conversion kit. The part number is 044099. The Hornady web site is
www.hornady.com. Of course the other issue is your powder measure device. For my purposes, the Pact will give you the best results. Not inexpensive, but very reliable and very accurate on measurements. I prefer the H322 powder from Hodgden. It meters very well and produces the most accurate loads that I have produced thus far. I have tried several powders and nothing seems to do as well in my AR's as H322. H335 does pretty well, but in my rifles, H322 is the best I have found. Hope this helps.