Which is why I thought the STW could clean this barrel chamber up if the reamer is positioned perfectly. Plus shoulder length dimensions on STW bit longer. Prob will be brass availability I bet.
Re-chambering question in 7mm
- Thread starter bjornf16
- Start date
bjornf16
Well-known member
Using a Sinclair chamber length gauge, I measured chamber length to be 2.577”
SAAMI max cartridge lengths:
7 WBY - 2.549”
7 STW - 2.850”
I don’t think wrong reamer was used; rather went .028” too far with the 7 Wby reamer. Visual inspection of the chamber looks like a Weatherby shoulder.
28 thousands would match the 7 layers of painters tape on case head base; that seems too much to just blow out shoulder.
I’m thinking 7 STW using shoulder headspace would work as well as 28 Nosler and 7 RUM.
Nosler and RUM brass may be easier to find
SAAMI max cartridge lengths:
7 WBY - 2.549”
7 STW - 2.850”
I don’t think wrong reamer was used; rather went .028” too far with the 7 Wby reamer. Visual inspection of the chamber looks like a Weatherby shoulder.
28 thousands would match the 7 layers of painters tape on case head base; that seems too much to just blow out shoulder.
I’m thinking 7 STW using shoulder headspace would work as well as 28 Nosler and 7 RUM.
Nosler and RUM brass may be easier to find
Having an area in front of the belt that is unsupported by the chamber is not a good thing. That condition will still exist with a 7mm STW
I think slugging the chamber will help to get some decent measurements.
Your showing our age, In haven't heard of anyone doint such for awhile.
bjornf16
Well-known member
Cerrosafe on its way.
If nothing else, I’ll have proof of messed up chamber after getting 28 Nosler punched
ButterBean
Hammer Time Executive member
^^^^^^^THIS^^^^^^^