Over the years I have always pondered why some barrels lead up more than others with cast pills so thought I'd post this theoretical query and try to pick the extremely knowledgeable brains on this forum...naturally that excludes me....:shock:
Here's the problem....Given the various hardness of different cast lead pills that people make, is there a general rule as to what velocities are approached before noticeable leading occurs?......
Before going on, I know there are heaps of variables to consider and this may not lead to a specific answer - but it strikes me that if you can consistently cast to a set hardness say 15BHN, does that mean the velocity also has a sweet point before leading becomes a factor based only on that BHN?
In asking the question, naturally would be necessary to make a few assumptions to keep it simple such as same powder and load, pressure levels same, no gas checks, same hardness, same case, same pill shape and size is cast along with same gun being used etc - in fact nothing other than the hardness of the cast is changed in this exercise - yes, I know it's impossible to do that...but this is hypothetical.....much like me shooting MOA bulls all day - so is there a sweet point in velocity based on the BHN and can that be (easily) calculated or applied to different brews?
Just wondering if anyone here has come across an answer or a reasonable suggestion?...be gentle now....I wasn't too good at quantum theory .>