257 Roberts

[Jim Watson]

To quote a usually reliable source, ME!

It was once popular to put .30-06 magazine follower and bolt stop in a Model 70 Roberts, too.

As I recall reading, that modification and the then M70 chamber throat gave you the "Three Inch Roberts." with one or another spitzer bullet of the time.
The next step was to lengthen the throat to accommodate the "3.3" Roberts."

Great things were claimed but really more because of heavy handloads and high pressures than the little bit of added volume.

 

[army_eod]

Here are photos of the Rem Model 7 in 257 Roberts.

She weighs exactly seven pounds.

 

[army_eod]

I found the brass on gunbroker today. I snagged 100 cases of +P cases. I ordered the other loading components. Now I can load 257 Roberts.