I sent an email to the guy that makes the bullets I am using to see if I should limit them to 1200fps. This is his reply:IIRC, you are supposed to treat coated lead the same way as plated - 1200 max; or so I have been led to believe. I know from shotgun, rifle and handgun, slower loads typically produce the best results over maxed-out hot ones.
I dont limit my charge to 15gr of Win 296 because of fear of leading or anything. Those shoot well for me and no sense in beating up the gun or me more than neededI’ve loaded coated lead over 1800fps with no problems at all. IIRC the load was 130gr HyTek Coated pushed by 21gr of H110 Out of a 8 3/8” Mod 686. There are some guys that shoot at my range that push coated lead over 2000fps out of Carbines and they say they get no leading at all. I shoot very few magnum loads these days. Just enough to keep my revolvers ready for Hogs. One thing to keep in mind is coated lead will give higher velocity than jacket bullets with equal powder charges.