Just got my first! A K31 1941 vintage. Now I am like a teenager in love. I'm trying to buy a 1911 and will probably pop for a 1911 carbine. This all goes back to the old adage, "Only accurate rifles are any fun." Also, you would be pressed to improve on the GP11 ammo and for the price, about $.50 per round, you may not bother to reload.
Good links:
www.theboxotruth.com Click on the C&R link at the bottom. Two articles, one on results with a scoped K31 (1/2" MOA) and another on a simple refinish job.
www.surplusrifle.com Lots of good stuff in here.
http://www.swissrifles.com/index.html Great site on Swiss rifles, history, models, manufacture dates, etc.
OK, so I now have ONE. Trying to buy a Model 1911 and a 1911 Carbine and, what the heck, I'll be looking for another K31 or two. When I win the lottery, a ZFK 31/55 Sniper.
Not all dies for 7.5 Swiss are for K31. Hornady and Redding and I think RCBS have K31 dies and 1911 dies. There is a thread in here about this, handloading forum.
Someone told me not to get started on C&R firearms or you'll get hooked like on dope.
I think they might be correct.
I am saving my GP11 brass. One day I'll go to the trouble to convert it to Boxer. In the meantime, I just put some Norma on back order.