daybraekThe mostly unrecognized downside of iron bomber is how the shorter fuse time limits longer spam angles on certain maps. Although I definitely run iron bomber the majority of the time, the fact that its even worth it to still use stock sometimes seems like a sign it's balanced.
On process you can spam from choke to mid point and it will explode in peoples faces. The iron bomber has no disadvantages, the -10% explosion radius is not noticeable. The only situation in which the stock grenade launcher is better is if you want to spam from badlands middle over house to resub.