Proper Bullet Size?

[Speedo66]

I've got an original 1873 Winchester in .38 WCF (.38-40), which is 40 caliber.

Can cast lead bullets at .402 safely be used?

Thanks

 

[243winxb]

Lead Cast Bullets

Slug the bore to get groove diameter. .002" to .003" over groove diameter should be ok. Read this>>http://findarticles.com/p/articles/mi_m0BQY/is_/ai_n16808616 another good one http://www.chuckhawks.com/38-40win.htm

 

[Jim Watson]

Barrel measurements are nice, but the round must chamber FREELY. If a cartridge with a .402" bullet goes right in, it is ok. If it does not, it is too big, no matter what the barrel slugs out at.

I have a .44-40 with .428" barrel but a close chamber. Anything but Winchester brass, I have to load .427s.

 

[Speedo66]

Thanks for the info.