No Heavy Weapons Ammo Perks

While in the Vault recently, someone mentioned how it sucked to lose rocket ammo on respawn after a team wipe. I've thought the same thing for a long time. Maddening to lose the ammo, especially right after a synthesis... Always thought it was just the heavy price of death... Then, others on the raid said it was the armor/extra heavy ammo perks that cause it. 

Apparently, it's the "heavy ammo" perks that different pieces of armor have that cause the loss of ammo on respawn.

With my Warlock and the way he was equipped with the perks, he could carry 8 rockets for the Hezen Vengeance (9 before an update a while back). But, he'd lose two or more rockets at every respawn. It works out most times that he has more rockets to actually use while in a raid when not using the perks. 

So, for raids, I'll not use the perks. But, for strikes or missions where I don't expect to need a respawn, I'll use the perks.