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alanint · 10-17-2011, 10:23 AM

Remember that bulges can also occur as extration is taking place. Cases are held in the chamber partially through heat adhesion. A round which is not delayed that microsecond through heat adhesion may be bulging as it is coming out of the chamber. Firing a 30 Luger in a 9mm chamber would cause a gas bubble behind the bullet at the area where the cartridge is necked down, forcing the round out of the chamber sooner than the complete burning of the propellant. If the case has left the support of the chamber walls an is still expanding as it extracts you will get these types of bulges.

Anybody want to try this out to see what happens? 8^)

10-17-2011, 10:23 AM	#6
alanint User Join Date: Mar 2008 Location: Marco Island, Florida Posts: 4,867 Thanks: 1,685 Thanked 1,917 Times in 1,193 Posts	Remember that bulges can also occur as extration is taking place. Cases are held in the chamber partially through heat adhesion. A round which is not delayed that microsecond through heat adhesion may be bulging as it is coming out of the chamber. Firing a 30 Luger in a 9mm chamber would cause a gas bubble behind the bullet at the area where the cartridge is necked down, forcing the round out of the chamber sooner than the complete burning of the propellant. If the case has left the support of the chamber walls an is still expanding as it extracts you will get these types of bulges. Anybody want to try this out to see what happens? 8^) Last edited by alanint; 10-17-2011 at 09:06 PM.