How was Silveira vs Lockyer not such a challenge? The Supreme Court had an opportunity to enshrine in its historical collection of error a decision supporting the "collective right" nonsense. They didn't trouble themselves no doubt because Miller vs US contradicts Silveira completely.
Timothy Bean of Texas was deprived of his right to keep and bear arms forever for having been found "guilty" of keeping shotgun cartridges in Mexico. The Supreme Court offered him no relief from federal laws which infringe his right to keep and bear arms.
The Fifth Circuit has explicitly declared the RKBA an individual right but found it "reasonable" that Emerson be denied his right to keep and bear arms without him having committed any violent act. The Supreme Court failed to use this opportunity to protect a right to keep and bear arms.
I haven't the case to cite, but I have been told that there is at least one Federal District which has ruled the federal prohibitions against machine gun manufacture to be invalid. Only fear of murder by jack-booted government thugs prevents such manufacture.
Please describe the opportunities to challenge judicial error regarding the Second Amendment which have been ignored by the pro-gun community. Which cases should have been pursued which were not? Which key decisions could have occurred and how would they have allieviated the infringements which we now suffer?
No, you provide me with the second amendment cases that the pro-gun community have ushered before the USSC. There are none. That's my point.