congratulations on re-inventing the SPEEDLOADER.
USUALLY factory .357 ammo uses FULL METAL JACKET ???
I don't THINK so! Its pretty rare to find FMJ .357 on the shelves, FMJ 9mm is EVERYWHERE.
No, that's what you are focusing on...
I don't know how you separate energy /"powah" from performance, perhaps you could explain your parameters?
For me ammo price, variety, and ease of shooting are not the primary factors I use choosing defense ammo.
I fail to see the relevance of discussing the accuracy of the cheapest crap ammo, and I'm skeptical of the premise that a company that makes crap .357 makes ok 9mm because "they make so much of it..."
And the point of this is??
Even if it were true mathematically, its a trick of averages. Just what is "better"?? Groups size? again, averages. You take all the different kinds of ammo, all different guns and all the different SHOOTERS, in each caliber, average the results and get a number. That's math, it works. Then claiming one caliber is more accurate using that number, doesn't work. Too many other vitally important factors are ignored.
Here's another point to consider, there is a 50/50 chance that your gun, your ammo and YOU will be below
average.
There is also the same chance to be above average. I don't see where averages matter all that much, what matters is what is in your hands, what it does, and what you or I can do with it.
I'm not trying to say the 9mm Luger isn't a viable choice, especially when fired out of the most inefficient pistols around (snub nose revolvers). I just don't see anything that makes it superior.
There are pros and cons to everything, and each of us has a different mix of priorities and requirements, and no one thing is the best at everything.
But please stop trying to convince people that 9mm is better than .357 because someone found some crap .357 that doesn't perform significantly better than 9mm, from a snub nose. It's not any more intellectually honest than claiming ALL 9mm loads are poor performers because the original 9mm load (a 124gr FMJ @ 1050fps from a 4") is surpassed by many other rounds today...