Re: What is the practical range of a Benelli R1 ?
Caliber? Ammo? Did you have a specific "long range" in mind? What kinds of targets are you needing to hit at extended ranges (i.e. - are you punching paper/steel or are you looking to hunt game)?
All of these things will factor in to whether the R1 will get the job done for you efficiently (and if game is your target...ethically).
From my experience with an R1 in .30-06 shooting Federal Match and Hornady ammos in 5rnd groups, they are capable of around 1.5MOA accuracy which isn't great by most standards. Several "reviews" I have read (take them with a grain of salt) report accuracy over 1.5MOA. Again, with some load development, that could very well be improved upon, but isn't likely to get you anywhere near match-grade accuracy and may not get you sub-MOA.
Most modern bolt action rifles (from the factory) will likely exceed that level of accuracy without much trouble.