One other question about this sxs. I was planning on loading some Magtech brass shells for it. I have two boxes of brand new brass. Trying to chamber the new shells into this gun, it is very tight. I then chambered some Winchester AA Featherlites (too long to shoot as they are 2 3/4") and they chambered just fine. Any thoughts as to why the tightness with the Magtechs? I also have3 on hand some Federal Gold Medal paper hulls that I may cut down and roll crimp.