Info on .243 Mendoza?

[243Mendoza]

Does anyone have info on the .243 Mendoza? It has a similar shoulder angle and neck to the 6BR.

 

[RickB]

My understanding is that the neck and shoulder are just like a 6mm BR. It is just put on a .243 Win case. I do not recall the exact case capacity, but I believe that it is a bit smaller than the .243 Win.

I do not know a 'smith who chambers them, but there were several people in the Pacific Northwest who used to shoot it. Perhaps one of them will fill in some details. It would be interesting to compare velocities with a 6-6.5x47 Lapua.