MEI = Meister Bullets
Linotype bullets = generally 22 BHN Supermagnum or rifle
Standard bullets = 12-16BHN ( depending on caster )
LSWC = Lead Semi Wad Cutter
JHC = Jacketed Hollow Cavity, not to be confused with Jacketed Hollow Point
JHC's are the answer to finding rapid and complete expansion at sub-optimal velocities.
The JHC is basically swaged into the cup with a "big" pocket in it, then the bullet is swaged shut in a ballisticly appealing manner with the pocket behind the point. Deforms instantly (and rapidly) at lower velocities because there is less material behind the point to transfer energy through, allowing what energy is present to act more forcefully through the lesser material.
If you are seriously going to do any load development with cast bullets, I can not recommend the Lyman Cast Bullet Handbook enough, I really cant. Great answers to most of the common questions on cast bullets that pop up here... including a great section on metallurgy and gas checks.
Gives load recipes for dang near every caliber ( except 458 socom, dang you *shakes fist* ( I know it came out after the most recent addition) and many hardnesses of bullets and powders in each caliber.