>>> What I am doing is pull off the pincher, and running the hook through the end of the tail,and turn the hook around and back through again.<<<
If I have this right you have TWO wraps of line going through the tail and then you use the egg loop to cinch it all down??? If this is what you're doing you would have the rest of the shrimp body flailing around like a whip. I'm suprised you even get ONE cast doing it like that!!!
You didn't say if you were plunking, bobber fishing or drift fishing either.
If drift fishing with a corky, don't use the whole thing, pinch it off at the tail just enough to leave one pair of legs on it. Run the hook from underneath the first segment where you pinched it off, let it dangle so the hook point is touching the backside of the tail then push the point through.
Slide the thing on and you should have enough meat left on the tail to snug the egg loop around the top. That's why I like the legs on it, BTW.
It may take a bit to get it perfect but this will stay on for a lot of casts. Some guys use a Jensen egg bumper to help keep the tail from sliding off but I don't.
Rigging a whole shrimp for bobber fishing and/or divers and bait you might get a few varying responses.
For the basics, start at the tail, hook point goes through the the joint of the last two segments from underneath. Thread the leader through. You can get fancy and thread it through the body once but the last place the hook goes is sideways through the head.
DO NOT mess with egg loop, but DO stretch the shrimp out along the leader so it hangs nicely, not all bunched up. Gently snug a half hitch around the first hole you made in the tail and you are ready to rock.
There are probably some tricks out there I havene't heard of too but this is kinda shrimp-hookin' 101 to get you pointed in the right direction.