I've read Dempsey's manual as well and maybe I'm wrong but from what I remember he doesn't say to drop your weight into your shot but to take and drop your weight into the trigger step and then explode with your weight upwards into the final blow. This is great when hitting a heavy bag but I've tried this in sparring and against experienced fighters it just seems too predictable. A move that is similar and works for me sometimes is the kind of jab that you see Charley Burley do a few times in that great video Dadi posted up awhile ago called "Charley Burley: Analysing Genius". Correct if I'm wrong but from what I see he drops his weight over his front leg like the trigger step but instead of exploding upwards immediately and risk getting countered he uses this new position more as a bait. The video says that he strikes when he senses hesitation. You've got to be careful of their right hand of course but if you employ the stance that the video beautifully illustrates you will see that this position is also a perfect way to set up a trap for the shoulder roll counter right hand. Mayweather uses this position as well and it's interesting to note that like Burley he is able to launch and land lunging left hooks without geting countered (though from the video it shows Burley landing angled left uppercuts to the body. I've tried throwing them on the bag for a bit of fun sometimes and found them a real bastard of a move. If you could land them I'm sure you could land a gazelle punch ).
Anyway here's the link. http://www.youtube.com/watch?v=81non05aKX4.
Check out the beautiful jab he does at about 4:53 while circling to his left. It's the closest thing I can think of to the Dempsey left jolt that has worked for me in sparring but I can only pull them off after I've circled to my left transferring weight over my left leg with each left step. I think my opponent gets used to this and doesn't expect a punch to be thrown from this position. I'm not a pressure fighter though so you might find it more useful faking a straight right to the body then throwing a left joltor try the ascending jab in this link. http://www.saddoboxing.com/boxingfor...echniques.html
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