The 550 will always give you that option.I also have a Co-ax I do all of my riffle loading on. I was considering this for hand gun only. But maybe the money would be better spent on a 550 for hand gun and some rifle like 223.
Note the add did say $500 obo
I have a SDB and a 550. To me the SDB is great to keep set up with one caliber. With the 550 you can keep tool heads set up. I bought my SDB when they were a lot cheaper and don’t think I would pay the price for one now. That said 500 with all those caliber conversions is a good deal as long as you don’t mind setting it up each time you switch calibers.I have only loaded pistol ammo with my RCBS rock Chucker. I saw a Dillon Square B with 45,44mag and 38/357 dies for $500 obo. Is this a deal or should I look for a 550-650?