I thought about doing this but want to make sure it is safe. I know the barrel would be exposed a bit but as long as it functions I am ok with that. I have alot of .40 so id like to use it because .357sig is pricey and very had to find around here. Thanks
The Glock 22 is the standard sized frame of the 40 S&W. You mentioned that you have a Glock 33. The G33 is a subcompact frame of the 357sig. That being said, It is possible to place a 40 S&W barrel in a 357sig Glock; however, I believe that you would need a barrel from a Glock 27 (the subcompact frame of the 40 S&W).
Below is a link to the Glock website that will list all the Glock models and sizes.