doubleriflejack,

Well said! I had been a bit concerned with the idea of using a 28 gauge shotgun action for the .303 Brit. I'm no engineer, nor am I trained in gunsmithing, but I know what you said above is true.

Yes, the Germans, Belgians, and Italians made many a double rifle up to 9.3x74R on frames of similar size to a .28 gauge shotgun. But these were rifle frames with much beefier construction and often with longer bars to accommodate the increased stresses.

If the original poster wants something like a .303 Brit on a .28 gauge frame he would do well to find one of the many pre-war German 8x57JR doubles for his purpose.

Safety must always be first.

Curl