What rounds could we see crossing over between long gun and handgun?

[Phaedrus/69]

Anyone actually witnessed the Beretta CX4 that 460Kodiak mentioned? I've got a guy trying to trade me either a 9mm or a .45 CX4, but I really don't see the appeal, except for the price of ammo.

If you mean a Storm in 10mm it doesn't exist, this is just a hypothetical thread. But the Storm is a great little gun! It's one of my favorites and my main HD/zombie gun.

Nice, MikeS! What is that, Thureon Defense?

Although there's really no practical need for it I would like to see a 9x25 Dillon chambered in some PPCs. It would rock in an HK UMP or MP5! An UMP in 10mm would be pretty cool, too.

.357 Sig would have some potential in PPCs. Any gun that can be chambered in .40 should work with the Sig with the appropriate mags and barrel. I imagine a .357 Sig out of a 16" tube would really be smokin'!

 

[Jaymo]

ISTR seeing some 10mm HK MP5s many years ago.

Ballistics by the inch shows .357 Sig as being a hot number from a 16" barrel.

 

[Panzerschwein]

+1 on the Beretta CX4 Storm in 10mm! I WOULD buy it, and make it take Glock 20 mags but also include 30 round mags for the carbine!

 

[Phaedrus/69]

There were some MP5's in 10mm, but not a lot. I haven't seen one in ages, and if I could find one legal to own it would cost way more than I could afford! Although I do think Brethren Arms might make a clone in 10mm. Even a good clone will set you back over $2.5k now.:banghead:

 

[RealGun]

I think "handgun' in the context of this subforum would be a revolver.

 

[ku4hx]

Love my PCCs: 9mm Luger, 40 S&W, 45 ACP and 10mm. And of course there's the venerable .22 Long Rifle: three handguns and four rifles.

 

[kludge]

The new bullets being produced by Hornady (not so new anymore I guess) have added a lot to the BC of the bullets giving them more range. And they still deliver a lot of expansion. They out perform the venerable .30-30 for example at shorter ranges. Of course they lose velocity faster because of being heavier.

Firstly...

44 cal 225gr FTX; BC=.150
44 cal 200gr XTP; BC=.170
44 cal 240gr XTP; BC=.205

The lighter XTP has a better BC than the heavier FTX... usually it's the other way around... heavier bullets of the same design have a better BC.

IOW pistol FTX bullets are marketing hype. Rifle FTX bullets on the other hand are the bees knees. Also, the cases for pistol rounds with FTX bullets are shorter (to fit in the gun), so there is less powder, so there is less muzzle velocity, that coupled with a lower BC means less performance.

Secondly...

Heavier bullets keep their velocity longer (assuming same design) because they 1) have a better BC and 2) F=ma. If the force of the wind is lower (better BC) and the mass is higher, then the acceleration (in this case drag) must be lower. Heavy bullets hold onto velocity better at long range.

Example:
280 Remington
140gr Nos Part BC=.434 MV=2900fps ME=2514fpe
@500 yards V=1922fps (66.3%) E=1148fpe
MPBR=285yds +/-3"
160gr Nos Part BC=.475 MV=2700fps ME=2590
@500 yards V=1839fps (68.1%) E=1202fpe
MPBR=270yds +/-3"
175gr Nos Part BC=.519 MV=2575fps ME=2577fpe
@500 yards V=1805 (70.1%) E=1266fpe
MPBR=260yds +/-3"

 

[rcmodel]

I'm late to the party.
But the OP question was:

What rounds could we see crossing over between long gun and handgun?

I would like to see a modern .25 or .27 Stevens rim-fire.
Like a .25 or .27 WMR.

Perhaps a 70-80 grain FP and / or HP bullet, depending on caliber, at about 1,300 - 1,400 FPS.

It would make one heck of a coyote size on down close range varmint cartridge.
And the FP bullet would be a better small game cartridge providing cleaner kills with less meat damage then most anything else.

And it would make a better RF SD revolver cartridge then either the .22 LR, or the .22 WMR for those that carry RF's for SD.

Never gonna happen though!

rc