After I spent hours collecting mis-information from all over the internet on how the bolt-spacing works out on the STA's, someone finally posted an explanation here on CGN a while back. From memory, it's:
- dual port action = 3.44" bolt spacing
- single port action (Right bolt, left or right port) = 4.4" bolt spacing
No idea why the discrepancy in spacings for the dual vs single ports, but I hope this is helpful.
I have a single port action right bolt left port with 3.44 spacing so no the single port is not always 4.4 spacing.
Last time a talked to someone at savage they called the 3.44 spacing the Palma spacing it's the newer design and eventually the target actions will be 3.44