“Third many shooters are using steel jacketed rounds for AK style weapons.”
No such thing. There are armor piercing rounds this a steel nose insert surrounded by lead/copper but they are expensive or difficult to buy (cop Killer bullets?), and Russian Mfg ammo usually have steel cartrige cases, but none...none are steel jacketed.
Think about it! How long would a rifle barrel last if you shot steel jacketed bullets through it????.... only a very few rounds before the barrel split or the lands worn completely down....
Note the “bimetal” jacket. Looks like copper but really is just a light plating of it. Scrap the copper off and it is steel - very soft. I have some WW1 7mm FMJ that is steel also. A good magnet will hold the bullet up off a table.