MP
We obtained a digital micrometer. It is fairly accurate, although some measurements of the commercial .257 roberts cartridge were about .0015 to .003 off.
Nonetheless, our casting measurements are as follows:
neck diameter - .2865
shoulder diameter - .4380
neck length - .3465
shoulder length - .2160
total case length - 2.241
We would appreciate any information you might have about this round...is it a roberts/niedner wildcat round we can reproduce or is one commercially available....is it ok to fire the commercial 257 rounds through the gun since it is very close to the casting...are there casings available for reloading...or are there notes of niedner or roberts or others that demonstrate how to make the round. We would hate to have the gun simply be a "wall hanger". It is a beautiful rifle and deserves to be used properly. Thanks to you and all those you have included in the thread.
Al.
