Cant angle on UM Kydex holster?

[Sentry]

I have an Uncle Mike's Kydex paddle holster for a Glock 20/21. It has an adjustable can't, but the problem is I can't figure out to what degree. When the muzzle is pointing towards the back, and the butt is pointing towards thed front, what cant angle do you think it is...20? I'm buying a IWB here soona nd I need to decide is why I ask.

 

[romulus]

I think 15 degrees is the angle for the "FBI cant". In any case it's a commonly decribed cant on many holster websites.

 

[Sentry]

I'm not sure. If only I actually remembered anything in matha nd kept my protractor I coudl see. When I put it in my current holster it tilts probably 2 inches forward. It's at least a 15 or a 20 I think. Since it has a large grip I don't want it to go too far forward so that I smack the grip on my draw and screw up the presentation, but I need concealment. I think Sidearmor recommended a 20? But I can't even get ahold of them.