Originally Posted by DepOne

They learned that lesson years ago in Miami. Whatever idiot had them carrying 9mm subsonic rounds should have been shot himself. Those rounds hit where they were supposed to but couldn't penetrate enough to cause damage capable of stopping the assailants. Subsonic 9mms are designed for suppressed machine pistols

I spent a day with the FBI HRT guys a few months ago and found it interesting they were almost all carrying 1911s in .45 ACP.

The FBI was not carrying sub-sonic 9mm rounds in the Miami Fiasco. 115 grain Winchester Silvertips were used, the 9mm subsonic rounds were introduced much after the Miami Fiasco. I believe you got your facts backwards, the early 147's were known to over penetrate and not expand fully or not at all. Generally in any caliber the heavy end of the spectra will penetrate deeper than the lighter faster sibling at least in a properly functioning hollow point; the exception being perhaps some +p+ 9mm chamberings. Likewise, it's not optimal to be facing a murderous highly trained combat Vietnam Vet armed with a MINI 14 chambered in 223 with any pistol, even a .45.

I voted for 10mm. The 10mm is one seriously awesome round! It does cost more to shoot unless you are a handloader, but the capabilities are much greater than the .40

A lot of this depends on what you want it for ? I would be very nervous about shoot a 10mm. in my home if I have a family.
Where is that round going to stop after it goes through the BG because it's not going to stop in the bad guy.
A 40 , frag hollow point ,ok , I feel a little better.

Originally Posted by dman

Where is that round going to stop after it goes through the BG because it's not going to stop in the bad guy.

I tend not to make over-penetration a deal-breaker for me when selecting a self defense chambering. In reading about police and civilian gun fights, the one thing that really stands out about them is that most of the shots fired, miss. This is true, even at very close range. That being the case, it seems counter-intuitive to worry excessively about firing rounds that might over-penetrate, since they would probably be less lethal than the missed shots.

The more important concern to me is actually being able to hit the target, under extreme stress, and having the discipline not to shoot in a direction where there are innocents in the background, with whatever round you intend to fire. That is a very tall order, by itself, if your life is being threatened.

If you look at ballistics charts, with all kinds(manufacturers) of ammo, between the .40 and the 10mm.....using 180 gr. and 200 gr. respectfully..the only major difference is ft. lbs. of force, and cost.

Originally Posted by berettabone

If you look at ballistics charts, with all kinds(manufacturers) of ammo, between the .40 and the 10mm.....using 180 gr. and 200 gr. respectfully..the only major difference is ft. lbs. of force, and cost.

Study the 2 different rounds in a reloaders manual: .40 dont even come close to the 10mm. I shoot and load for both, and there is NO WAY IN HELL i would try to push a 180 gr bullet at 1400 ft/sec out of my .40. my handloads for the .40 run 975-980 ft/sec. my 10mm loads run 1430-1440 ft/sec. both using 180 gr XTPs. OH yea I voted 10mm

Like I said...........

.40 on steroids = 10mm

10mm is my preferred carry round.

A .40 is to a 10mm,what a .38 special is to a .357 Magnum.

10mm every-time.

Price and availability of the 10mm is my only concern. As far as over penetration, for what is worth, for defense purposes I use hollow point ammo.