i have a 6.5 on a 30-06 case and it shoots great. you can purchased most barrels at a cost of under $400 but I would suggest a 8 twist and at least 26" for accuracy . I use a 140gr. burger and reloader powder and the gun will shoot bugholes at 100 yrds. also make sure your smitty knows you want to be able to load the bullet to the lanz. good luck and any further info I might be able to help you with let me know,
