Well, that would depend on the boolit or bullet. Longer than a bullet load requires, yes but my cast and patched boolits are too long for the throat. Not really a contradiction as the boolits are being made to fit an unsized neck and not to have a bore-ride nose. I do have a rifle with a well worn throat and bore that does accept a magazine length boolit seated firmly in an unsized neck and engage the long leade. Now that's a gem! I have another with an oversize bore that does the same but it has a reverse taper from midway on. I will be range testing it before I consider chopping the barrel down to make a bush carbine. My rust enlarged 'pig gun' is the same but its rifling is very rough yet id does seem to shoot quite well within what could be considered a bush and rain gun's working range.I take it that your chamber throat is longer than what the OAL of the magazine affords?