Weak ejection spring: The ejection spring is responsible for providing the force needed to eject the spent shell casing from the chamber. If the ejection spring is weak, it may not have enough force to eject the low brass shell, which is lighter than a high brass shell.
Dirty chamber: A dirty chamber can cause the spent shell casing to stick to the chamber walls, making it difficult for the extractor to remove the shell casing. Cleaning the chamber regularly can help to prevent this problem.
Bent extractor: The extractor is the part of the gun that grabs the spent shell casing and pulls it out of the chamber. If the extractor is bent, it may not be able to properly grip the low brass shell casing, causing it to be difficult to extract.
Weak extractor spring: The extractor spring is responsible for providing the force needed to hold the extractor in place against the shell casing. If the extractor spring is weak, it may not be able to hold the extractor in place with enough force to properly grip the low brass shell casing.
Damaged shell casing: If the shell casing is damaged, it may be difficult for the extractor to grip the shell casing properly. This can happen if the shell casing is dented or if the rim of the shell casing is damaged.
Inadequate lubrication: If the gun is not properly lubricated, the moving parts may not function properly, causing the gun to fail to extract the spent shell casing.
If you are experiencing problems with your Browning A-5 not extracting low brass shells, you can try cleaning the chamber, inspecting the extractor and extractor spring, and lubricating the gun. If the problem persists, you may need to take the gun to a gunsmith to have it repaired.