Whenever I hear things about "JD Jones" and his arrogance, I always feel like he needs to "shove it"
where the sun don't shine!And while I'm fairly certain I'll never ever own a .300Whisper anything, I have looked carefully at the .300/.221FB wildcat. To make the "whisper" work as adverised at sub-speeds, one needs about a 1-in-8 or 1-in-8 1/2 inch-twist barrel to stabilize (in .30-cal) heavier projectiles like the longer Sierra Matchkings. 1-10 is much too slow.
Also I think the Fireball case was chosen because of its .223 sized rim and case diameter, but also to ensure that the resulting wildcat cartridge would remain short enough
to work in the already-existing AR platform/frame/receivers (yeah duhh!) Altho I also think there's nothing "magic" any cartridge casing ..... that the "casing" merely serves as the "engine" that holds the "fuel" (amount of gunpowder) that drives whatever bullet through whatever caliber of bore.
(the science of physics is a constant and certainly not "magic").In other words, why couldn't a .30Carbine casing be mated with a .30cal bullet to obtain similar velocities as the "whispers?" Or the .32-20? Or the new .327 Federal Magnum casing?
Provided the correct amount of powder to do so could be contained in those "straightish" cartridges?Also there are rounds like the .223Rem necked up to .308 and the 7.62X39 slightly necked down from .311/.312 to .30cal that prodice interesting cartridge-bullet combos - and combined with a powders like Trailboss or SR4659 or similar that might could produce subsonic velocites ......
What I recall about the .300W or .300/.221 is that it used @11.0 grains of whatever powders to achieve @1050-1100fps from @16 to 18in barrels. And if a competent reloader/shooter
was patient and safe and carefully experimented with "minimum loads" or squib load-type data,
what could might be achieved?
I know this thread started by asking about the .300 Whisper, and would such a cartridge work in the Handi-platform?
Well, why not!!??
Rimmed brass is available for the .222 Remington and while expensive, could be shortened and swaged into "rimmed" .300/.221 cases! There's also the Rook cartridges, and there's also the .30 Herrett too.
One wildcat I became aware at "Steve's Pages" is one called the .300 Streaker, derived from a necked-down (and considerably) shortened .30-30 case. I believe it was originally conceived as a pistol round, but why couldn't it be adapted to a short or medium-barreled singleshot?
If a reloader "could" work with 10-12-14 grains of a [relatively] low-pressure propellent, in whatever "brass" one chooses to launch subsonic bullets, methinks the possibilities could be unlimited.
Of course my comments here are directed to extremely careful and responsible readers!