My 458 did the same thing, it needed the gas port drilled to .102”...simple drill bit and I enlarged it...now it cycles and drops spent cases 6-8ft in a nice pile...
Lets share the Love of un-SafeAct with the rest of the Country...I know the odds are extreme, BUT, just maybe the Fudds will wakeup in the last remaining free parts of America....but Fudds being Fudds.....
Another alternative (and actually my favorite) The early models had issues, but my new version has been rock solid, they do have a break in period of 150-200 rounds..Firing Pin in Bergen, has a demo and has had thousands of rounds with no problems...street price $400ish...