Understandable those are cartridges you don’t typically see in gas operated semi-auto rifles.

The short action magnums like 6.5mm PRC, 300 WSM family (7mm WSM, .300 WSM, .325 WSM), and Ruger Compact Magnum family all use the ubiquitous .532” case head diameter of the .375 H&H that almost all the standard Kong action magnums like .300 Winchester also use.

Look at it this way, they should fit in the Delta 5 short action, and magazines already exist for them in AICS pattern. So from a development standpoint some of the grunt work is already done.

The 6.5mm PRC is going to sling 140-147gr pills at 2900-3000fps maxing out the speed limit in PRS or NRL.

The Winchester short magnum family basically duplicate the ballistics of their long/standard action magnum counterparts with equivalent bullet weights.

So we’re talking about a useful step up in power and down range performance with a bolt face, barrel, and magazine swap.