Glock says don't shoot lead, so you looking for some "expert" to tell you its ok ?
Glock and many other gun companies say "Not to use reloads". But many many of us do including competitive shooters safely. The are covering their rears from liability issues.
All of the newer handguns I own Ruger, Glock, Springfield and CZ all say not to use reloaded ammo.
Yes there are issues shooting lead in a Polygonal rifled barrel and those reasons alone should be enough not to use lead. Safety should be the #1 reason not to and accuracy should be #2.