DANCESWITHEMPTIES; The six cavity moulds produce good bullets, but come with a learning curve. Mostly in learning how to get the mould up to an overall consistent temperature, so that the cavities fill evenly Which can take some time. So, if your casting time is limited, this is one consideration. Also, expect more rejects during the early part of the casting session. Which can be both time consuming and frustrating, at times. It's pretty much a given, that you should pre-heat these moulds, in advance. Same as when using a steel mould. This helps. On the plus side, once you get the moulds up to speed, they can produce a lot of bullets in a relatively short time. Once you get your casting rhythm in a groove.
Over the years though, I've come to prefer the simple, 2 cavity moulds. Mostly, because I found them to be quicker and easier to set up and run, than their 6-cavity brothers. As long as I did my part. The 2-cavity moulds come up to casting temp very quickly, produce fewer rejects and produce good bullets. To up my production capacity, I run 2 moulds in tandem during each casting session. Sometimes 3 moulds, but rarely. Unless I need to slam out a lot of bullets in a hurry. I found that once you develop a good, consistent casting rhythm, this method can also produce a lot of bullets, in a relatively short period of time.
A couple of Lee moulds I've had good success with, are the 158 grain (358-158 RF) mould, and 125 grain mould(358-125 RF). Both these moulds are also available in 6-cavity models. It bears mentioning that I own and use a 6-cavity, 125 grain mould . Though not very often, any more.
Regardless of model, the Lee moulds are capable of turning out good bullets. I do own moulds from other manufacturers. Including some custom mould makers. But, most often turn to Lee moulds for the majority of my casting needs. The moulds are relatively inexpensive and do a good job. They work.
Al
Hope this helps.