The smallest SLAP round produced was the 7.62x51mm and it's not a very good round. Penetrates armour only slightly better than the usual steel cored AP round.
The reason Armies use predominately BALL ammo is all down to economics. Rounds are bought in there thousands for all eventuallities. You don't shoot an AP round when training (unless thats the pointof the training that is) and come a conflict the Ball ammo is still the predominat ammo type. A guy wearing a vest is a liable to being made mission ineffective as the other guy. The difference the guy with the armour has more chance of surviving the encounter and of returning to duty later.
I'm not going to get into the deluded perceptions expressed here about people carrying on fighting with their arm hanging off or the like. I've seen it, I've done it and it doesn't happen.
The reason Armies use predominately BALL ammo is all down to economics. Rounds are bought in there thousands for all eventuallities. You don't shoot an AP round when training (unless thats the pointof the training that is) and come a conflict the Ball ammo is still the predominat ammo type. A guy wearing a vest is a liable to being made mission ineffective as the other guy. The difference the guy with the armour has more chance of surviving the encounter and of returning to duty later.
I'm not going to get into the deluded perceptions expressed here about people carrying on fighting with their arm hanging off or the like. I've seen it, I've done it and it doesn't happen.