I am getting quite a bit of lead building up in my 1911's and it doesn't make sense. I am using a 200 gr rnfp which is cast to 18 BHN. I am loading it over 5.3 grains titegroup. This should give me just over 900 ft/sec. though I don't have a chronograph. They shoot pretty well in all my guns. I have loaded lots of lead over the years including for 357 and 44 mags and never had this much buildup. Of course with the 44 mag I was using a much harder bullet but I am not pushing these very fast at all. Is it possible that it is a problem of using the titegroup with this particular alloy? DOES TITEGROUP BURN HOT ENOUGH TO CAUSE THE EXCESSIVE LEADING?