"I've done it for so many years I don't even give it a second thought."
I'm with rburg on this. I'm still using some of the same revolvers I was using 30 or more years ago and they still give excellent service and top accuracy. Upon inspection their bores will be bright and shining, the rifling sharp and clean.
Not only will the jacketed bullet loads clean the barrel of lead residue but will minimize lead rings on the cylinder face, lead residue accumulation on the leading edge of the sides of the cylinder at its front over each chamber, and lead residue accumulation on the underside of the top strap. A cylinder-full of jacketed bullets does all of this. Then the revolver is cleaned easily and normally. I've seen other revolver shooters scour and dig at these areas, trying to clean them up.
Keeping guns clean avoids so much wear and so many mechanical issues. Regular cleaning makes the cleaning chore much easier. My firearms are thoroughly cleaned after every shooting session. I don't use lead bullets that perform so poorly that they lead like fiends. I don't follow up shooting lead bullets with some gut-bustin' hot jacketed bullet handload either.
I never saw leading as a big problem but I have to wonder if a few rounds of good jacketed ammunition is less detrimental to a bore, forcing cone, top strap, and cylinder face than some methods of lead removal.
As far as ironing lead INTO the bore, I have to say I'm very skeptical.