I don't have any experience with the 7SAUM but I have built several 280AI's. I find that they are very easy to load for, have almost zero recoil, and shoot extremely well. I have shot 140 grn TSX, 150 grn ABLR, 154 grn SST, and 162 grn ELD-X bullets out of these guns and all of them have been extremely accurate. My trusty rifle that I hunt everything with has a 27.5" Lilja #2 barrel, VX-5 3x15 scope and weighs 9lbs loaded with 5 rounds and sling. Even though I have had many choices over the years, I find myself always reachíng for the AI when I head out to hunt. I have a custom 28 Nosler that I built 4 years ago that remains unfired due to my passion for the AI.