.38 Special Bore Diameter

JDBoardman · Nov 13, 2014

I have searched the forum quite extensively without finding the answer to my question:

What is the nominal land diameter of a S&W .38 Special barrel?

My reason is realatively simple - I wish to make set o range rods to check cylinder-to-bore alignment (timing) and check for bent or sprung yokes. Brownell's is 'out of stock', and a call told me it will be 'a while' before they are back in stock. Meanwhile, I have a wild hair... and don't want to wait.

John

bob42 · Nov 13, 2014

My range rod, from Brownells, measures .342.
This is NOT the one offered for "Target" guns.
Bob

klausinak · Nov 13, 2014

A link:

SAAMI

Make sure you open it in Explorer, the PDF's won't work otherwise

Nightowl · Nov 13, 2014

I have the Brownell's service and match size range rods for the .38/357 revolvers. The match measures .3475 and the service one measures .3445. Perhaps this will help you make which ever you want. I used a Dillon Precision digital caliper.

WR Moore · Nov 13, 2014

JDBoardman said:
I wish to make set o range rods to check for bent or sprung yokes.

A range rod doesn't check yokes. You need a yoke alignment spud/tool. It fits inside the yoke with a reduced diamter where the extractor rod fits and has a stud on the large end that fits the center pin hole in the breech face.

I'd definately buy that one.

.38 Special Bore Diameter

JDBoardman

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bob42

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klausinak

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Nightowl

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WR Moore

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