what is the main difference between the square deal and 550 ? what one is better for only loading pistol (9mm) and why? I see the squar deal comes with dies?
Since you are loading pistol rounds lets forget the other features and get down to (in my opinion and others might disagree with me) the
biggest disadvantage of owning the Dillon SDB.
The RL550, XL650 and Super 1050 use standard 7/8 x 14 dies. Meaning you can buy any non-Dillon dies as long as it is the standard 7/8 x 14 die, you can use it to reload in your Dillon machine. Your choice in the market is unlimited!
SDB on the other hand uses the
proprietary Dillon die (not the standard 7/8 x 14 die), which is the big turn off to me. Using SDB die does not give you any flexibility in using other die brand... especially U-Die or Lee Factory Crimp die, which in my opinion necessary for reloading pistol round for semi-auto. Needless to say some other parts of SDB is more expensive than RL550 I.E conversion kit, strong mount or tool head.
Dillon make good quality reloading machine, but considering of buying an SDB model does not make any sense to me. In my opinion for a few extra bucks difference, I wont even look into buying SDB-period!
Again, this is my opinion and others may disagree......That's just my 2-cents worth of advice.
