Recoil spring for 400 Corbon conversion

[505Gibbs]

With the model 21 - if I purchase the conversion barrel for the 400 Corbon cartridge is there any thought that the recoil spring would have to be raised above the 17# standard one or would it be just a matter of seeing where the cartridges eject before going that route?

thank you

[JR]

The ejection pattern of the brass will tell you if the spring pressure is enough.

[505Gibbs]

Thanks for the confirmation JR!