The 357 Mag/ Max barrels responds very well to circumcising
A 16 1/2" barrel is a very easy to carry and a delight to shoot.
The current barrels can also be turned for even more weight reduction.While The barrel can be bobbed at home with no problems or special tools, turning the outside down requires the services of a lathe however.The forearm attachment will also have to be removed and reinstalled.
The good new is by cutting the barrel length down you gain velocity

.The bullet reaches its maximun velocity in 16".
Check out this chart from Ballistics by the inch.
http://www.ballisticsbytheinch.com/357mag.html The young man in my profile pic swears by his ultra light 357. It works so well I had to build his sister one for her first hunt this year.I am more excited than she is ( and she is really really ready

)It is great being a Grandpa!!
Good Luck with your project, if you have any questions just ask
George