Quoted:
most people/dealers dont knowits not legal to have a 50rd mag in a (non NFA) gun in OH.
Lets shoot for clarity here please.
For center fire ammunition:
The fact is you can own all the 30, 42, 50, 100 and 120 round magazines your heart desires in Ohio.
The law says that you shall not have more than 31 rounds loaded into said magazine unless associated with a title II weapon.
IF you have 31 loaded or belted rounds or go so far as to have two magazines taped together that total more than 31 rounds associated with a title I weapon then it becomes "dangerous ordnance".
Now only a shit head cop would pop you for this, but considering Ohio cops, well, you'll probably get popped.
The last case I recall was in bedford and the prosecutor was Thomas Longo (of Mafia fame) who used "dangerous ordanance" as a "tack on" charge for some poor bastard that taped two 25 round Uzi mags together. It was plead away and dropped (which was expected), but it is a tool that cops and prosectors use to fuck up your day.
Edited to correct round count.