You don't say what slingshot you are using, what bands, or whether you shoot through the forks or over the top. But SJAaz suggested maybe the bands that work for airsoft don't have enough power to put 11mm steel through or over the forks.
You don't say what slingshot you are using, what bands, or whether you shoot through the forks or over the top. But SJAaz suggested maybe the bands that work for airsoft don't have enough power to put 11mm steel through or over the forks.You are shooting 11mm steel with the same setup that you shoot airsoft BB?