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			Gene, 
 I bought my first 550B about 15 years ago.  I do remember that I had a problem with the primer feed.  I have been trying to remember just what was wrong.  It was either a adjustment or operational error on my part.  Once I fixed it, I have had years of great service.  Same with the auto primer feed on small primers.  I made a poor adjustment and had a 4 % error, in primers being inverted.  I corrected that, and it is 100% for the last 600 rounds.  I do have a few rounds I load in limited quantities.  I will only neck size, hand prime, weight each measure (lyman electronic powder feed) and seat, and then crimp all individually.
 
 My first electronic scale was a Dillion and it went bad.  Dillion replaced it at no charge.  I like the electronic scale and it pays to have weights to test them.  What I think is important is the powder dispenser, that it throws the same charge.  Most loads I do today are plinking loads so + - 0.1g is no big thing.  When I loaded for bench shooting, I had a balance beam scale.  I don't think electronic scales where around in the 70's.
 
 H.
 
 edited to add, I have had real good accuracy with the Dillion on 308's.  Clover leafs at 100M.  on a stock ruger MkII Bull barrel,
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