I've seen several Fieldcrafts with the rail mount - If I don't need the extra elevation because I'm not shooting past 600 yds is there any benefit to it over Talley lightweights?
Only in mounting position for proper ER. Probably won't have any problems with a short action unless your scope is really short with short ER. It's also a bit stronger than Talleys,though whether it's needed is debatable.
