It's a rather large spacer.. Removing that will give you a host of other issues you'll have to address - issues that I'd be loathe to attempt w/o a serious conversation with the owner first..
Came across a Model 70 Short action in .257 Roberts today and am wondering what the max Coal in this action is since I load my own now. As I stated its in .257 Roberts...
When you say 'came across'.... I assume you saw one for sale some place.. I have a feeling it's for sale all right, for a very good reason..
I still cannot understand why people want to jam a H&H cased round into a .223 length action.. (just stating extremes to get a point across)..