Last week I leaded my .45-70 after only 6 shots (no fillers used) using the Lyman 457193 at around 1600 fps. I could push out long slivers of lead using a tight patch and, with some work with a brush, it cleaned up. When using the RCBS 45-300 FN I had no problem and figgured the gas check was the reason. Shouldn't 1600 fps be attainable with a plain base WW boolit?
Somewhere in time, I ran across a tidbit about plain base boolits shouldn't be sized for the throat diameter (mine were) or they would lead, instead groove diameter was preferred. Comments?-JDL