The only advantage the 10 10 has over the 505 is the MAX amount each will weigh. The 10 10 will weigh more, BUT the 505 will weigh out more powder than anyone will ever load in a cartridge.

Every time you adjust that little wheel on the 10 10 your bang the scale around, on the 505 you don't have that problem.

In my shop, iquit stocking the 10 10's, and i never had even one 505 come back.

I'm still useing a 505 that's over 30 years old and it's still as accurate as new.

DM