Looking to purchase larger caliber rifle.
What is the difference between 338 rem ultra mag
and 338 win mag ? Either one kick more ?
Either ammo more available ?

Big difference. The UltraMag will kick much more. Here is a great chart that will show you recoil for just about every popular round. Just scroll down when you click on it.

http://www.chuckhawks.com/recoil_table.htm

Here is more about each round and energy stats....

http://www.chuckhawks.com/rifle_ballistics_table2.htm

The 338 Ultra Mag will absolutly stomp the snot out of you!!!!

I have owned a couple of 338 Win Mags and the recoil was tolerable. I had a friend that had a 338 Ultra and the recoil was on a whole different level.

If you think you need more gun than the 338 Win Mag then step up to the 375 H&H. Usually a 375 H&H is a heavy gun so you feel less recoil.

338 Win Mag ammo is much easier to find and cheaper too.

You could not pay me to own a 338 Ultra Mag and trust me I have shot guns way bigger than that with far less felt recoil!

If a 338 win mag wont do it it aint meant to die.

I agree with JCB. If you want more than a 338 win mag step up to the 375 h&h.

I owned one 338 win mag in a Savage (oh Lord forgive me) and it did have some kick but nothing that wasn't tolerable. I did shoot one pig with it and needless to say it did the job.

and just what would this be used for, thas a lot a gun

A hog now and then. Neighborhood coyote ?

Moose, elk etc.

.338win ammo will be much cheaper and easier to come buy and you will not notice the difference if you shoot a moose with them

I have had the opportunity to shoot both calibers. Both of them also had muzzle brakes. The 338 RUM definitely had more kick. It felt like a 300 win mag to me. The 338 Win mag felt more like a .270.