Cant imagine Benelli couldn't build a decent barrel. If they couldn't get under a two inch 5 shot group they wouldn't last long. My Remington Semi 308 first shot 2 in groups, over a short period of time, with a 1.5X6. I could get 1.5-1.75 all day long, once I could pin point dead center with a 4-12x my groups tightened.There's a lot of factors, I watch guys off a bench and it makes me cringe. They sit at a different level each time they shoot, they hold the fore end one minute, and not the next, I can see the barrel moving all over the place....Good Grief, if you hold the gun improperly all the time consistently you would be better off. A lot need to learn to shoot, I mean when sighting in.
You've heard the phrase- "Its not the Gun its the Shooter"... that's still holds true! A buddy of mine recently sent me a picture of a brutal group with his 6.5 Creedmore, I asked what he was smoking, he said he was at the open range that day...34F and very windy. It was a bad day to be driving in never mind shoot!
Learn to shoot consistently, exactly the same hold, shooting position etc. Once you figure that out move to different Brands, weight etc. Then you can have a true understanding of wear to lay blame.
I think you will find, it's not the gun. I recently bought a Benelli R1 308 after my 44 year old Rem 7400 simply wore out and started to act up.. At this point in my life, my Benelli doesn't have to last 44 years like my Remington did, but if it gives me the same pleasure I'm a lucky guy.
P.S. the Rem Semi 308-
I'm spending the whole 17.00 on the Main Spring, Firing Pin Spring, then if It fires two boxes in a row without an issue, I'll simply sell it at a reasonable price.