I have used all three that u have mentioned. A rb out of a .50 will generally not completelu pass through a deer on a shoulder shot,but will expand to about the size of a quarter,and be found on the offside just under the skin. A solid will generally pass completely through given the same caliber,but some will also remain in the animal sometimes acting like a rb,but not expanding as much (gotta use pure lead,better expansion). The HP will give good results and some will expand,depending on how fast they are traveling. A good blood trail depends again where the animal is hit. A heart/lung shot will drop the animal fairly swiftly. If the pump is ruptured,all bleeding will take place in the chest cavity of the animal,with possibley a light blood trail,but you have a deer in a very short distance. All basically depends on projo placement. If its put in the correct place,you have a deer. If not,you will be trailing it for a looooooooong time. A rb gun the twist should be about 1-66 generally, A slug gun,1-28 to 32. Im not sure what the rifling is on the new inlines but I know that it varies a bit. Shoot what your gun shoots the best,and then,you will also. King