When shooting my 625 JM in IDPA, I am restricted to 3 reloads (total of 18 rounds), why am I not allowed to carry as much as the auto loaders? (30)?

They get to start with a magazine (10) plus one in the chamber plus two more 10 round magazines....

Seems revolver shooters are at a decided disadvantage.......especially when so many stages are not revolver friendly.

Randy