Can you rechamber a .270 WSM to 6.8 by shortening the shank/chamber end and running a finish reamer?

[can1010]

270WSM brass made by ADG, Nosler and Norma.

and all three are available for use in 6.8 western with Nosler and Norma needing fireforming

 

[FEENIX]

I built my 270WSM with a 7 Twist! Personally though I'd just buy a new barrel and start from scratch. I built my 270WSM with a 7 twist and had it done with a total of .200 Freebore.

270WSM brass made by ADG, Nosler and Norma.

I contemplated building the .270 WSM in 2012 but went with the .270 AI instead, partly due to the brass shortage at the time. In addition, it is my first Ackley. I prefer the .270 WSM over the 6.8 Western, especially now that the brass selection is significantly better. My .270 AI is 1:8" (the fastest twist available at the time); 1:7" is the way to go.

 

[JAYgs8163]

and all three are available for use in 6.8 western with Nosler and Norma needing fireforming

None needed to fire form in 270WSM

 

[fseaman]

Thanks everyone. The twist is the reason why a new barrel is the better choice... I should have thought a little more.

There is no "should have"

Glad the banter sparked thought. Here is an additional idea if you reload.

With a new barrel, you can get a faster twist, say 7t or 8T, and stay with the 270 WSM and use all the same reloading tools and supplies.

 

[JAYgs8163]

There is no "should have"

Glad the banter sparked thought. Here is an additional idea if you reload.

With a new barrel, you can get a faster twist, say 7t or 8T, and stay with the 270 WSM and use all the same reloading tools and supplies.

I built mine with .200 Freebore and it's a hammer.

 

[Jim’s Hunt]

I would say yes by taking of about 1/4" of tenon rethreading a rechamber with a long throat. I just don't see any benefit in doing so. But it is your rifle and your dollar

 

[Hudge76]

There is no "should have"

Glad the banter sparked thought. Here is an additional idea if you reload.

With a new barrel, you can get a faster twist, say 7t or 8T, and stay with the 270 WSM and use all the same reloading tools and supplies.

This would be the route I would go. I have rifles in .270 WSM and 6.8 Western. The better bang for the buck is more free bore and a faster twist barreled 270 WSM.

 

[Morrison]

The reason that they are 2 different "Calibers" is the twist rate of the barrel. If you want a 6.8 - change the barrel.
You can load the heavy bullets in the 270 WSM cartridge but the twist rate is designed for the 140 through 160
grain bullets.