Marc,
I don't have any experience in working on this model Astra, but if I were you, I would find an exploded diagram of the gun... identify all the moving parts that affect the dropping of the striker or hammer, and then scrupulously clean all those parts of the decades of grime and buildup.
Polish to a mirror finish all the parts that rub against each other while manipulating the trigger, with very fine abrasives strips of extremely fine polishing cloth or stones. Don't remove any metal or changing any metal geometry contours during this process...and then lubricate with a good oil and put the gun back together and test the trigger pull. If this procedure doesn't bring the trigger pull down to an acceptable weight by removing all the foreign object resisitance, and smoothing the moving parts, then it will be time to do a patient study of the mechanisms and see what other resistance can be removed or relieved...
Don't use any abrasive or grit coarser than 400 during the polishing process. You might also see if some of the springs may be TOO strong, like the trigger return spring...
If these actions don't improve the trigger pull, then it will be time to seek the services of a competent gunsmith with Astra experience.
Good Luck.
__________________
regards, -John S
"...We hold these truths to be self-evident that ALL men are created EQUAL and are endowed by their Creator with certain UNALIENABLE rights, and among these are life, LIBERTY, and the pursuit of happiness..."
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