My first encounter with backweighting (or counterweighting) came in the 1970s. Jack Nicklaus helped popularize it. Some of your stronger golfers would put a fishing weight in the butt of their driver - and sometimes FWs - to quiet down their hands during the swing. It supposedly helped them "drop it into the slot" more efficiently.
So, I'm not surprised Nicklaus is spokesman for Bossieri Secret Grip line.
The whole weighted grip thing has taken on religious overtones, with believers and non-believers exchanging heated remarks on the topic. @rob0225, possibly you're a non-believer?
One argument for backweighting says it can help players with faster swingspeeds make use of the superlight shafts. Golfdom testing indicates that better players get more out of superlight shafts than average golfers, because the average golfers tend to overswing with light shafts and can't feel it "drop into the slot." Backweighting has been suggested as a way to help average golfers in this area. (A couple of years ago, Sergio Garcia backweighted his driver and ended up with a C7 - or so - swingweight).
In 1994, I gave up a persimmon-headed driver with a 130-gram TT stiff shaft. I moved to graphite. By 2012, I built myself a driver with a 48-gram shaft while at the GolfWorks school. Getting it swingweighted properly was a major challenge.
One argument against backweighting (for clubs other than putters) says it robs the golfer of clubhead speed, and upsets the club's balance.
Backweighting also appeared as an option with the ShotMaker shaft insert from Harrison. I put a 4-gram plug into the butt of the club, and it seemed to make the club feel less head-heavy.
I have some sites and online articles (somewhere...) which I will look for. In a day or two, I may post some sources which those interested could read.
Edited by WUTiger - 8/4/14 at 2:23pm