The Ross appears to me to be a simpler action than the K31 and definitely far stronger. No one has yet succeeded in blowing up a 1910 Ross action with whatever they can fit in a .280 case, plugged barrel or not. The blowback incidents are still slightly mysterious, but most are explained by misconfiguration of the bolt head. On some early M-10 .280 rifles, this was quite easy as the extractor slot was ramped at one end. This was later corrected, and it then became necessary to remove the extractor or completely disassemble the bolt in order to get it together incorrectly. Even when incorrectly assembled, most bolts will not slide smoothly onto the guide rails. Ross barrels were known to be quite long-lasting and there are many which have obviously fired thousands and thousands of rounds from the wear seen in them today.