[rsilvers]

Most trademarks are not registered. In fact the TM symbol you see all the time specifically means a non-registered trademark. SAAMI never would have accepted Whisper as the name unless SSK provided a document saying it was free for everyone to use.

Also the name implies quiet, which means suppressed, and I think the future of this concept is primarily full power ammo. Time will tell when we see the split in ammo sales between subsonic and supersonic.

So why not name it 300 Fireball? Two reasons... One is that it implies bright flash of light and loud. The other is that there were too many wildcat chambers kicking around with that name, and using that name might be considered to imply that the ammo was safe to fire in all of them.

So a completely new name was needed.