I've got a RRA in 458 SOCOM that is giving me problems. Feeding the first round out of a magazine causes the rifle to have light hits on the primer and a failure to fire. When the bolt is manually withdrawn, sometimes the round is extracted but, more often, the loaded round remains in the chamber. I've tried everything to get the initial round to slam home and function properly, but it's to no avail.
The reloaded ammo is checked with a chamber gauge and fits perfectly so it's being properly resized. Also, all subsequent rounds that self-feed from the magazine feed-fire-eject normally. Why is it that the first round just refuses to fully chamber and often doesn't have the extractor slip over the case rim?
