Its a straight bull barrel Stang, threading should be able to co all the way down the barrel (I hope).

From another post.

Well I sent off the 28" Criterion Bull barrel I had on my Savage to get rechambered in 30/06, Larry Racine will be doing the rechambering and barrel mounting, he is also doing some trigger work on my short action accutrigger at the same time. Seems I will lose about 2 1/2 inches off the barrel, should end up with a 25 1/2 inch bull 30/06 barrel. Have never used Larry's services before but he seems like a dammed nice guy, plus he has some great shooting on his resume'. I have to decide on chamber spec, he has 06 Springfield and match reamers, can someone tell me what the big difference is between the two and advise on what I should get? I m hoping going 25 1/2 inch wont hurt me too bad vs 28, will be looking to shoot it max 1k meters/yards.