Within the last 4 months I made the change from 550B to XL650 and can tell you that the change over was not difficult, but until I was able to learn the exact 650 sequence, it was somewhat frustrating. During that time I wished for my 550 back on more than one occasion,
but at this point I'm extremely glad the move was made and couldn't be happier.
► Do not be concerned about the powder measure. Dillon uses the
exact same powder measure on the 550 and 650 models.
► Do not be concerned about case retrieval. Dillon uses the
exact same brass buttons on the 550 (stations #2-4) and 650 models (stations #3-5) with a very nice spring loaded gate on station #2.
► A major concern is height above the press if you get the case feeder. With the Strong Mount you'll need a
minimum of 42-1/2" above the bench, then another 3-1/2" to dismount the case feeder itself. So, at least 46" free and clear.
► The big "gotcha" is that the 550 is so very flexible that a person can get very relaxed about setup sequence, whereas the 650 is a "
sequence Nazi" !! A workable sequence is as follows:
1. Pour powder into the hopper and use a spent case (inserted into station #2 and retrieved from station #3) to dial in the powder measure.
2. When the PM is set, then add the primers. Then cycle the primer feed mechanism 6 times.
3. When the primer feed is set, then add brass to the case feeder and turn ON.
4. Start loading.
► All this sequencing is because the shell plate advances a full station every time the ram is lifted more than 2". On a 550 you can raise the ram and then lower if you think of something else. Whereas you are generally fully committed once you raise the 650 ram.
► By far the biggest plus of the 650 is that spent primer de-capping and new primer insertion take place at different stations. This means that the
spent primer and all the associated smut can be completely captured IF you fit one of the "spent primer collectors" available from numerous third party vendors. This 100% trash collection means the 650 stays much cleaner and grit-free. ( See:
http://www.uniquetek.com/product/T1346-650 )
► Lastly, if you have (say for instance) 380Auto brass sneaking into your 9mm brass, then the case feeder is going to exacerbate this issue. I've been able to cure this by improving my process. I use a 40 cal plastic ammo tray to compare and count all cases before they are dumped into the case feeder hopper. (See
)
Hope this helps.