7 PRCW Repeater — Medium vs Long Action for AICS Mags?

[cp255]

Looking into building a 7 PRCW repeater. Needs to feed reliably from AICS-pattern magazines.


I understand 7 PRCW is longer than a standard short action round, but not quite full long action length. I’m assuming a medium action is the default choice, but I’m open to running a long action if that’s what’s needed for proper cycling and to avoid issues with bullet seating depth — especially when running heavy 180–190gr class bullets like the Berger hybrids.


Action options I'm considering:

• Zermatt TL3 (medium)
• Terminus Zeus (long action)

This is a range-only rifle, likely going into a McMillan or Foundation stock — not interested in chassis systems.


If anyone’s built or run a 7 PRCW repeater with AICS mags, I’d appreciate feedback on what action length actually works in practice. Trying to avoid feeding issues from the start.

 

[X Count]

This might be food for thought. I'm running 7saum in a CIP length 300 win mag MDT magazine and it works fine.

I went this way because if I decide to do a longer cartridge in the future I already have the bottom metal setup to accommodate the longer CIP length mags.

 

[Sniperhandle]

The 7PRCW is based off of the 6.5 PRC so they are almost identical in length to a 308 win.

 

[SKWERLZ]

A medium action is perfect for the short mags running long bullets and would be very nice.

A long action is a safe bet if you might step up to a longer magnum cartridge in the future.