I love Bill Springfield's triggers!

Never met the guy, but I have made a MINT FIXING his work

With about an inch difference between sear surface and disconnect, single stage triggers have a severe limit limit on how much they can be tuned without eventually failing. Adjustment and re hardenign of the disconnector can save them some times, but often its nto worht the risk, especially with so manty makes of parts out there.

Lighter springs can help, but can risk light or incomplete reset, and light strike malfunctions. You can decide for yourself what risks are acceptable for your rifles and their intended use.

There are some things that can help single stage triggers, like the "long range trigger adjuster", or however its marketed now, that simply pre loads the trigger (reducing up take) by runnign a smaller screw througha hollow grip screw intot he back of the trigger. It works, and doesnt reduce ignition reliability. however, the trigger may need to be adjusted to maintain safety engagement.

Personally, i prefer a 2 stage trigger, mostly Geissele, because it allows me to safely get the trigger pull i desire. Captured single stage units with fixed geometry can also give very good results. But i personally am very cautions about how much i'll cut a stock trigger.