Hello bghntr416,
Your Farquharson, being made circa 1886 would have been in a different calibre than it now is, my own Farquhason is also chambered in 303,but I am sure that would have been rebarreled more recently as it was made circa 1887,I find that as it has a very long throating to accommodate the 215 Gr bullet, it is difficult to seat a 180 gr bullet far enough out to touch the rifling, especially with the "boat tail" bullets that are now available, I am using 45Gr of H414 with the 180 gr bullet, or 25 gr of H4227 with a cast lead, gas checked 215 Gr bullet. As Huvius has stated, you may want to keep your brass dedicated to just this rifle and neck size only, which is what I do. You can check the records to see what calibre it was originally chambered in, unlike me, as mine is a G,Gibbs with no records available, but the frame size would give you some clue. Good luck with your endeavours !
Chris.
