Thomas and Betts aka T&B makes great crimp tools, one model crimps up to 0 gauge with adjustabl;e die on the head, it rotates around and locks on a detent to the particular size you want. They make a larger version that the dies have to be manually removed then reattached and dies for 500 MCM (about a half inch ID wire) are available.
These are less costly than the hydraulic tools made for electricians who do a lot of crimping but you need some armstrong grease if you use them a lot.

__________________
'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!