I've noticed many people claim that the harder lead don't obturate enough to fill the grooves and can cause leading. However according to Laser-cast their bullets which are a 24BHN will begin obturating at 11,500 and will be fully obturated at 13,000psi. These lowish pressure numbers are less than what pressures we deal with in many handgun cartridges. I am actually thinking of magnum cartridges. These are pressures that are easily reached in any medium or full house magnum load. Even standard pressure loads reach these levels.
It is commonly recommended when someone has leading problems to try a softer alloy. The BHN of the Laser-cast bullets is quite hard and harder than any other bullet alloys from other companies I've personally seen. I get no leading with them and have read many times of others getting no leading with these unusually hard lead alloy bullets.
So as you can see I am confused. Hasn't anyone ever done a definitive scientific study? It appears there are many opinions based on experience which I agree is excellent however I'd like to see an exactly explanation of what is actually happening under the varying circumstances done in a controlled test.
If you go the Laser-Cast website and go to "Load data and Evil Roy DVD" then select "Bullet Obturation" you will see what a metallurgist wrote.
It is commonly recommended when someone has leading problems to try a softer alloy. The BHN of the Laser-cast bullets is quite hard and harder than any other bullet alloys from other companies I've personally seen. I get no leading with them and have read many times of others getting no leading with these unusually hard lead alloy bullets.
So as you can see I am confused. Hasn't anyone ever done a definitive scientific study? It appears there are many opinions based on experience which I agree is excellent however I'd like to see an exactly explanation of what is actually happening under the varying circumstances done in a controlled test.
If you go the Laser-Cast website and go to "Load data and Evil Roy DVD" then select "Bullet Obturation" you will see what a metallurgist wrote.
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