This rifle is in 40-70 Bottle Neck. Barrel length is 30", LOP is 14", and weight is 8 lbs.
A bit unusual in that it is a target arm from the 1880's and not that many target rifles were made. Most of Remington's production of rolling blocks were in military configuration.
"F" grade is described in the Remington Catalog of the mid 1870's as being stocked in the Creedmoor Pistol Grip Style with a hard rubber butt plate and nose cap plus having improved vernier tang sight and windgauge front sight.