SDS S12 12 Ga, 3" Chamber 19" Threaded Barrel, Black, Optic Ready, 5rd

After receiving my shotgun I did a thorough clean and lube. I shot roughly 100 rounds ranging from cheap Walmart shells Federal and Remington(1200 FPS) to good Hornady and Winchester 00 buck 2 3/4” and 3” 00 buck. I adjusted the gas settings for the cheap stuff on setting 3 and setting 1 for the higher FPS. I had 2 observations the first one was with low brass the shells didn’t like loading into the magazine you had to play with the shells for them to slide in correctly. The second one was if the bolt was closed there was a little bit of a challenge to get a loaded magazine to fit into the weapon. I’m unsure if this is just the factory magazine problem. I currently only have the factory magazine the shotgun comes with. Over all I am very happy with the shotgun and believe this to be a fantastic variant of the Saiga 12.