The 300 Blackout is a little more than a year old right now.
No, the .300 Whisper and others have been around since before the First Soldier of Fortune Invitational Three Gun Match in Columbia, Mo.
Having personally attended, I was aware of the controversies that came out of that event, and besides having hundreds of participants march down the highway singing jodies as they made their way from bar to bar, things happened on the range. Certain competitors on the leading edge of shooting came with AR15's chambered in a .30 x5.56 cartridge, call it what you will. The point was that the rules were biased to main battle rifles only (as was thought proper at the time,) and this was a work around to get the AR15 into the competition.
It was summarily dismissed. Things change.
The shooting public has been aware of the .30 wildcat for over 25 years, some have attempted to promote their version, but it still boils down to ballistics - it's a large diameter bullet with not much power behind it. That doesn't mean it's ineffective, just that it's ballistic performance should be matched - CORRECTLY - to the job at hand.
Cartridges are designed for certain dynamic tasks, don't fall into the trap of insisting that it's a XX.Xmm vs YY.YMM kind of winner take all contest. That's testosterone challenged thinking, and the .50BMG gets to play, too - don't go there.
When choosing a cartridge, first specify the ranges and type of target it will be used on, then match which ones do that. You don't use a framing hammer nailing trim on a jewelry box, nor will a nail gun fasten girders together and build a bridge.
While marketers tend to put everything in rosy perspective, it's not their fault if the shooter makes a poor choice.
