I have a 7mm rolling block short carbine with saddle ring . It has Uruguay mark on the stock. Very tight strong sharp edges on hammer , block and very deep excellent riffling.I have shot 5 rounds of lead cast bullets out of this rifle just to see if it would shoot. It does. 10 grains of unique. Not over loading . I dont Think I want to deal with all the neck sizing annealing and all other factors that go along with these rifles. What would be a good re barrel that the ejector would be the same. No big bores the older I get the less I like recoil.