+100....Read this from Buffalobore. This is no B.S. I agree with it completely. - They do manufacture the most effective .380 ammunition.
Seriously consider their .380 ammunition if you intend to carry the .380 as your primary.
Buffalobore chronographs all of their ammunition in actual firearms and not "test" barrels.
Visit their website and check out all of their cartridge offerings. It's incredible ammo and worth the extra $$ for carry ammunition.
The 380 auto inhabits a valuable and useful place in our society, mostly because of the easily concealable, tiny pistols chambered for it. HOWEVER, because of the very limited size of the cartridge, it is plagued with limited power and therefore most of the existing ammo in 380 auto suffers from not being reliable as a man-stopper. We've studied and played with nearly all of the existing available 380 ammo and find it wanting as a reliable means of self defense, especially against a large, insane, drugged up/pain free, determined attacker.
Here's the problem. The current 380 auto frangible ammo delivers a large amount of surface trauma, but lacks serious penetration. For example, if you shot me or another sane man in the face with modern frangible 380 ammo, it would blow off a big portion of my cheek and send a few teeth down my throat, I would undoubtedly fall to the ground in shock and pain, but I would be very much alive and functional if I could get past the shock and pain as that frangible bullet would have stopped some where inside my face, never making it to my brain. However, if you shot a drugged up maniac in the face with that same frangible 380 ammo and blew half his cheek off, he would keep right on coming because he is insane and is not thinking like you or I. Plus, he is likely pain free and fear free and wont know that half his cheek is missing and if he did know, he would not care. So whatever 380 ammo you shoot him in the face with, had better go through his face and blow his brain stem out the back of his head, because only a CNS (central nervous system) hit with a 380 is going to stop him. Likewise, a torso hit to the sternum needs to penetrate deep enough to blow all the way through his spine in order to shut him down spontaneously. If you fail to shut him down instantly, you and your loved ones are going to have to find a way to survive while you wait for him to bleed out and pass out. The best chance of survival for you and your family is to shut down the attacker instantly. So, we've designed a few 380 auto +P loads to keep you and your loved ones alive under the worst of scenarios.
This 380 Auto+P ammo will better all American made 380 Auto ammo by 150 fps to 200 fps in all bullet weights we make. This is a serious improvement in this typically anemic cartridge. This 380 auto+P ammo is more powerful than the typical 38SPL ammo made by most American ammo makers and you'll get 7 shots of it in a small/flat/light weight 380 versus 5 shots out of a bulkier 38 SPL J frame revolver. Additionally, with the 380 you'll get much faster reloads and the little magazines are flatter than a speed-loader used for a J frame.
Item 27A/20 is a 100gr. HARD cast bullet with a flat nose. It is traveling over 1,150 fps out of my 3.75 inch BDA (Browning Double Action). We've used a flash suppressed powder for all three of our 380 auto loads so that you wont be blinded by your own gunfire if you have to shoot in the dark and since around 95% of all civilian shootings in America occur in low light, the chances that your own gunfire will blind you while you are trying to save your life, are good - we've eliminated this variable by using flash suppressed powder. We've also chosen a flat nosed solid bullet. The flat on the nose ensures that the bullet will cut/smash its way through flesh and bone and do much more destruction than typical round nose FMJ bullets. Round nosed bullets tend to slip and slide through matter, doing little damage as opposed to a flat nosed bullet. The flat nose not only wounds much more than a round nosed bullet, but it actually keeps the penetration straight and thus deeper. Notice the below velocities recorded from my personal 380 auto pistols. These are real world guns and thus the speeds are realistic and not exaggerated speeds produced from laboratory test barrels. What you see with Buffalo Bore Ammo, is truly what you get in the "real world", where it matters. You can expect 20+ inches of straight-line penetration in flesh and bone with this load. If you are worried about over penetration with this load, DON'T! You chose to carry a tiny under-powered 380 auto pistol and the trade-off is that you are now going to have to stay alive with that pistol and over penetration will be the least of your worries if you end up needing this gun to save yourself or your family.
IMO, the BB stuff is the GOLD standard for the .380 round. It's one of the only .380 rounds that I feel comfortable loading in my Sigs and feeling like I'm comparably armed to one of my .38 Specials. I would not want to be shot with any .380, but that 100gr Hard Cast thing just looks like it will put the hurt on anyone, drugged up or not. Being that a lot of folks like the 115gr 9mm round, IMO, you're not giving up a whole lot, and gaining a good measure of concealability. Both my Sig P238's eat um up like candy, very accurate too.