baloney. I have shot nice groups with
both loads. Joules are a measure of electricity, IIRC. So what's that got to do with recoil, hmm? Recoil is momentum. Momentum is simply mass x velocity. PART of any increased powder charge wt has to be considered to be part of the "ejecta", tho when calculating recoil. So a 100 gr bullet at 2000 fps DOES have a bit more recoil than does 200 grs at 1000 fps, but it's very little more. It takes 7.;5 grs of powder to get the 200 to 1000 fps in the .45 ACP, it takes 12 grs of powder to get the 100 gr to 2000 fps. So in effect, the 100 gr at 2000n fps recoils like 200 grs at 1020 fps. Big deal.
Just because YOU dont happen to know anything about something doesn't mean that it isn't perfectly feasible, you know. Ever heard of THV Arcane ammo? That was a 60 gr .45 ACP, made of brass, very short bullet, with a big hollowbase. It was 2200 fps. Their 45 gr 9mm was 2300 fps, both in 5" barrels. Do a search for RBCD ammo, then look at their LEO "tactical" .45 load. 80 grs, 2300 fps. Come out of the 18 th Century guys. You are about 100 years behind the times.
The 100 gr bullet is made of nearly pure tin. It is cast from a Lee 155 gr mold. Typical combat ranges for civilian defense is 6 ft or less. Even if the bullet DID tumble in flight, it would still be a helluva smack at impact.