Potatohead said:
God, all this crap is confusing.
Potatohead, I will give it a try. Here goes.
In the begining, God created lead and there were lead/cast bullets naked without any covering and shooters were not ashamed of their naked bullets.
Then copper gas checks were used on the base of lead/cast bullets to reduce leading issues on higher velocity bullets/loads. Then the gas checks evolved and grew in length and became jacketed hollow points (JHP).
When the shooters saw that full-length gas check bullets were good, they made Full Metal Jacket (FMJ) bullets with exposed lead base but some people who were concerned with lead made a disk to cover up the lead base to make Complete Metal Jacket (CMJ) bullets.
Then people started applying copper plating to lead/cast bullets to look like more expensive copper jacketed/full-length gas checked bullets but shooters found the cheaper plated bullets did not have the same level of accuracy and could not be pushed too hard due to thin copper plating. They also suffered from bullets being out of round so they increased the thickness of plating (TP) and double struck the bullets (DS) to improve consistency.
Then one day ATK/Speer trademarked the term TMJ to describe their thicker copper plated bullets as Total Metal Jacket and everyone else had to use other more confusing terms to describe their copper plated bullets.
To improve accuracy of plated bullets, when Berry's Manufacturing added hollow bases to their plated bullets (HB) to help with bullet base expansion and better stabilize the bullets with longer bearing surfaces, all the shooters in the land saw that they were good.
So now you know what a Berry's HBRN-TP DS bullet is.
Now, there are traditionalists who want to return to the practice of shooting lead/cast bullets and refer to their hand cast bullets with an endearing term of "boolits" and often hang out at castboolits forum -
http://castboolits.gunloads.com/forumdisplay.php?8-Cast-Boolits
This is my story and I am sticking to it.