That depends on the particular brand and model of irons that you have. Some irons could be adjusted this much but other irons are not adjustable at all. Here is a link for irons that we know there can be a problem with trying to adjust loft this much.
If you can tell me which irons you have, manufactures brand and model, I can possibly be more specific as to how much they can be adjusted.
Date published: 2016-09-26