As the subject states, what exactly prevents an autococker bolt from being blown back while firing a ball? Im focusing this to the setups which claim to operate at like 35psi recocking or thereabouts. this is only about 1 or 2 lbs of force at the shaft -> holding bolt.. very light cocking force.
I have tried placeing an air ram at this same pressure directly behind a bolt tip and firing, but the bolt will get blown back by the propelling air.. unless i crank the ram pressure way up.. well beyond chopping point.
About the only thing i have decided holding the bolt in place is sticktion, mass, and slight binding (bolt -> backblock -> recocking arm). By the same token, how do shockers manage, since they are line-drive behind the bolt with an air ram..? all sticktion??
And i guess a follow up question is how much pressure pushing back typically does the bolt see (cocker, shocker) when firing?