450/400 3" bullet diameter?

[Chrisbritton]

I'm seeing conflicting data for this... everything from .405 to .410/.411

For reloading purposes.. I see some hornady data using .411

Comments please

 

[318AE]

Slug your bore - mileage varies, especially with vintage 450/400’s. What type of rifle? A vintage double or Ruger No 1?

 

[Chrisbritton]

ruger #1

 

[Tintin]

Woodleigh do a 450/400 3” bullet for Ruger No. 1, it is .410”.

Bullet Specifications, Dimensions & Details (.405"-.458") - Woodleigh Bullets

Woodleigh Bullets - Premium Bullets for All Game

www.woodleighbullets.com.au

 

[318AE]

ruger #1

.410

 

[Hunter-Habib]

Any .450/400 Nitro Express rifle built after 1927 will have a .410 diameter.

 

[Chrisbritton]

very much appreciated folks!

 

[Troubleshooter]

Bore diameters on the very early ones (including the 3-1/4" NE version and the 2-3/8" BPE) varied widely; I seem to remember reading that they ranged from .408" to .411" or possibly .412" but as 318AE mentioned above, Ruger standardized their bores at .410" for their No.1 rifle. The 3" NE version should be .410-411" but as mentioned above, the only way to know for certain is to slug the bore. On my vintage Jeffery the bore slugs at .411" but it is plenty accurate with the more commonly-available .410" bullets.

You should be OK with .410" on your Ruger though.