SSShooter is your Bartlein going to have the T Style / Gain Twist rifling. I corresponded with sometime back with them about a ream and re-rifle project as I wanted to try a gain twist not offered by anyone else. What are you going to chamber the barrel too and if time allows I would love to hear about your results when it's up and running. They have the technology to cut any cut rifled gain twist rate that one's heart could ever desire. They are right up with Krieger in the winning circle and for those not in the know the founders are X Krieger employees thus the know how to build one of the best barrels out there.

Great fellows to talk to about your needs as well as having the knowledge to address any technical  questions that might arise. 

All top cut rifle barrel makers lap post reaming and post rifling so the interior finish is equal to a button rifled barrel with the difference being about .0004 choke being lap towards the muzzle to create a positive gas seal. I am a Douglas man to date as my 32-40 barrel as well as my 38-55 barrel were real hummers. I am now in the process of putting together an RKS barrel to try due to the barrel being built around the bullet I will be using as well as the gain twist and the lapped in choke for comparison sake. There is a hug advantage of having Ron Smith build you a barrel due to him making the interior dimensions around the bullet you choose to use and the frustration of trying to find a bullet that will work is totally eliminated.

J.Louis

JLouis wrote on Oct 15^th, 2012 at 4:19pm:

Yes. They are building my Rem 700SA in 6.5x47 'space gun' next month (just got off the phone and they think their schedule for a Nov delivery is going to hold). Placed my order for a 30" long 1-in-12" to 1-in-10" gain-twist 5R barrel for my 25cal Low Wall Schuetzen rifle build. Their belief is that the 5R rifling provides better support to the long cast bullets than does the standard 4-groove. It was a toss-up between them and the 6-groove barrel that McGowan offers. Bartlein is about $100 more and 3x the wait, but I've plenty to do in the interim. Planning on a #3 Win Profile, which is about as big as would want to put on a Low Wall, but provides some additional mass for off-hand. The downside is the 8-10 month delivery. Hopefully, in time for Chris's Thurmont, MD shoot next October, if all goes well.

Couple of folks I shoot BPCS with out here are using RKS 40-65 gain-twist barrels on their CPA rifles. They generally shoot AAA or Master scores.

Will have to dredge up my original thread on this 25/20 Low Wall from over a year ago and update.