I have a lead sled and I like it. Works as advertised. I sighted in my .257 roberts, .270 win and my friends 6mm and 35 whelen in an afternoon and it allows me to keep my eyes open when shooting. Hardly any felt recoil. I have not noticed any change in POI nor did my friend.

As far as recoil, it is my understanding that most recoil force is generated from the gasses escaping after the bullet leaves the barrel (I guess this is why muzzle breaks work at reducing felt recoil). So I would believe most barrel lift would occur after the bullet has left the barrel. I also asked my wife (she's pretty smart,in spite of being anAggie) about why the lead sled reduces recoil and she gave me the Ol' F=ma or a=f/m, so if acceleration is constant (from the bullet) then force is reduced as you increase mass (the lead on the lead sled). So the lead would be absorbing more force than the gun. Anyway, that's my two cents worth.