Welcme to MO.
Is the 336 XLR limited to just Hornady Leverevolution, or can I put other rounds though it as well (Winchester Super X etc...) ?
The 336 XLR is not just limited to the Hornady Leverovolution round. You can shoot the cheap stuff also. I have a 336XLR that my daughter uses (has taken over) I have tried different ammo but the Hornady is soooo accurate thats all I shoot through it. Is a very nice gun and you won't be dissapointed. Now I have a 308MXLR also and in that you do have to shoot 308ME ammo and regular 308 will not work. The ammo is out there. I can buy locally gander mountain,scheels. I have bought mostly on line though because has been much better deal on pricing. It is on line almost everyplace that sells ammo.
Again welcome to MO. Lots of info here. Be prepared to spend some time here.