Smallest barrel to accept 5/8x24 threads w/out shoulder…

[270quest]

Thinking about spinning a 8 twist barrel on the tikka 7 mag to shoot heavier bullets and have a bit heavier/stiffer barrel for a suppressor. Going to finish at 22”.

How much barrel will I need to still get threads on it without the need for a false shoulder?

Was looking at a Bartlien 3B - that’s around .700 at 26” so guessing maybe .710 ish at 22?

The #3 shows .670 at 26”, so even if it’s .680 at 22, not sure that’s enough?

I was set on a carbon barrel but for the price I can get a bartlien right now - steel makes far more financial sense.

Thoughts?

 

[Firestone]

Why not just go 1/2×28 and pick whatever contour you want? Unless you want a heavier barrel

 

[pods8 (Rugged Stitching)]

Recommendations vary but thunderbeast specs as an example want .725” minimum for 5/8-24.

Going too little and you probably have more chance of damaging the minimal shoulder you tighten against.

There are .75” straight contours as an option.

Thunder Beast Arms Corporation [TBAC] | Tech | THREAD SPECIFICATIONS

 

[nphunter]

Just use an adapter and cut it however short you want. I have a Kimber at 16.5” with a super skinny barrel.

 

[Samson7x]

A bart 3b will have enough for 5/8-24 at 22”

I’ve got one threaded with that at 23” and no issues.

 

[SloppyJ]

5/8= 0.625".

Anything extra is shoulder. Divide the remainder by 2 to get your shoulder dimension since that's a diameter. This is assuming the bore is dead dick centered.

A safe bet is .750" finished at your desired length.