My gunsmith has a 7-375 reamer but not the 7LRM that I had my heart set on. Normally I would rent a reamer for him, but that option is not as available here in Canada as it is in the states. He's giving me a great deal on trueing up my remington action and chambering the barrel. This is my first custom. He also said the only real advantage to the 7LRM is that I could buy brass. (Gunwerks) I know the 7LRM has a longer neck since the shoulder is moved back. Is this difference worth not going with the existing reamer my gunsmith has and forming my own brass? Even if I have no dies yet? Would quality of brass be even comparable? Gunwerks has priced their brass quite decently. Seems like a small issue, but I don't know where I would get a reamer that I would only use once with out having to buy one. So, what do you think? 7LRM or 7-375?