Just shot some JSB 15.89 Diabolo in 5.52 and I'm getting sub-1/2" groups at 40 yards. The Walmart Crosmans do this but on occasion toss out a flier. Velocity is 785 with these for an energy of 21.75 Lbs/Ft at 10 feet. Not bad at all.As far as the RWS 350, these are very large and heavy. Also like taming a Tiger to be your pet puddy-tat. They are very hard on scopes, hard to cock and not fun to shoot in my opinion. The Maximus is very light weight, can be carried with a sling, uses any scope, isn't hold sensitive or pellet picky and gets around 30-40 usable shots with 15-20 in the high velocity sweet spot.I was worried the hand pump might be a chore but turns out to be much, much easier than I thought. One reason is you get one shot for every 1.5 pumps, give or take and the max pressure is only 2,000 PSI.Coming from someone who has had both the 350 and the Maximus, there is no comparison between the two. Another real positive for the PCP is that springers seem to wander in their POI as weather changes, the gun warms up and the planets align. I also own a HW95 and owned a Walther LGU that did this to a smaller degree. They were accurate when they wanted to be. My Maximus is accurate when I want it to be. If the PCP is too loud, there are cures for that. A magnum springer going off sounds like a hammer hitting an anvil.Good luck with whatever you choose. Edit:Addison, Do you ever get this far east? If so, you are more than welcome to stop by and help me empty pellet tins.