I recently started casting for my Rugger .44 mag. I am using WW for lead, adding a small amount of tin, and water quenching them from the mould. The mould is a 250 grain Keith style SCW. I loading with 19 grains of 2400 powder. I figure the velocity should be around 1000 FPS according to the loading manuals. I have lubed them using Alox and sized them with a .429 Lee sizer. (I did not lube them the second time after sizing) I bought a used RCBS lubesizer and RCBS lube but haven't used this as yet. Last night I shot a box of these home brews as I sighted in my Ultra Dot sight. I was not sure what leading looked like till last night. I ran a patch of "Ed's Red" down the barrel and followed it up with the brass bore brush. I noticed flakes and shreds of lead on the cloth the gun was resting on. I cleaned the barrel 4-5 times using the same process but switching between Ed's and Hoppes #9. I let some of the cleaning solution soak in the barrel for 20 minutes while I ate a sandwich. I was finally able to get the barrel clean as evidenced by a clean patch and looking down the barrel with a bore light. What have I done wrong to cause this much leading after shooting just 50 bullets?