Shilen 18" barrel and bolt

[tplace]

Does anyone know which chamber the Shilen barrels use? And, correspondingly, is the included bolt .125 or .136? I called Shilen but the person in Customer Service was unable to answer the question.
Thanks,
Terry

[Drifter]

Unless something has changed, it's SAAMI chamber and ~135 recess (Type 2) bolt, and they'll only sell the barrel and bolt together. The exception is if the customer supplies a 135 bolt to Shilen for proper headspacing when the barrel is made.

[tplace]

Thanks, that is what I thought but I wanted some confirmation.

Unless something has changed, it's SAAMI chamber and ~135 recess (Type 2) bolt, and they'll only sell the barrel and bolt together. The exception is if the customer supplies a 135 bolt to Shilen for proper headspacing when the barrel is made.

[tplace]

Well I just got this from the nice lady at Shilen, she told me they DO NOT use a SAAMI spec and sent me this drawing. Can some one look at this and determine if it is in deed a SAAMI? I can't figure it out. Thanks,
Terry
http://i1224.photobucket.com/albums/ee37...4878fc.jpg

[rickOshay]

That appears to be a Go/No Go gauge. Its not a 6.5 Grendel chamber drawing.

Here is a link to the drawings: http://www.65grendel.com/forum/showthrea...l-Drawings

[tplace]

Wow, you're right. Guess I don't have a future as a machinist, high school shop was a long time ago.
How about this one? If I'm reading it correctly (slim chance) it's not SAAMI.
http://i1224.photobucket.com/albums/ee37...75ae86.jpg

That appears to be a Go/No Go gauge. Its not a 6.5 Grendel chamber drawing.

Here is a link to the drawings: http://www.65grendel.com/forum/showthrea...l-Drawings

[LRRPF52]

That one above is a PTG reamer print specifically for Midway, and says "bolt gun only". It has a tighter .294" neck, but it does have the compound throat if you look at it.

SAAMI chamber has a .300" neck and compound throat. You can see the compound throat with the freebore starting at .2644", then goes down to .2617" before the conventional angle into the rifling.

I personally wouldn't want a .294" neck in a gas gun for 6.5mm. My .260 Rem gas gun has a tight neck, so I have to size all my brass before I even load it up, even new Lapua cases, which takes more time and effort to load.

[tplace]

Man, I'm about ready to give up on Shilen. The lady helping me is super nice but just isn't getting what I'm asking for. thanks to everyone looking it over, I'll keep looking.

[r5329]

Congratulations on "super Moderator" !!!

[tplace]

Just following up, finally got the correct drawing and, to my untrained eye, it appears to be a SAAMI chamber. Whew!
http://i1224.photobucket.com/albums/ee37...cd4e24.jpg