Man...I'll admit it, I'm stumped here. I typically shoot Missouri's Hi-Tek Cowboy #3 44 in light magnum loads and have zero issues with it. I wanted to get them closer to std 44 mag speeds, so I bought a box of their 44 Elmer K projectiles, for the life of me, I cannot get it to stop leading. Here's the data: Ruger Super Redhawk, 7.5" barrel. Over 8 to 11.7g of Unique, I get leading in land/groove the first 30% of the barrel and it doesn't take long for the accuracy to go to pot. I've tried all loads between 8 and 11.7 (which produced 1337 fps ave). Shooting even 12 of them will produce significant leading. So, I figured, speed them up. I played with all kinds of 2400 and H110 charges, I took them to 1400 fps +, all the way up to 1600 fps ave, which is cooking. All of those gave me nasty leading all the way down the barrel in the groove of the rifling, which was a major pain to clean out. Typically, that would tell me "slow them down". If 1337 fps is leading at the beginning, and 14-1600 fps is leading all the way down...I really have no clue where to go form there. I'd rather not waste the $$ on the projectiles...but I just don't get where to go from here. I measured the dia of them ad they're identical to the CB #3, .430". I'd write it off to a projectile dia issue, but the 12 hardness bullets shoot just fine. The Elmer K projectiles are 18 hardness.