Hi, i have the opportunity to use one XR200 on 4.5mm and I have to say Is a fine and well made rifle, using JSB 13.43 gr pellets at 890 fps the groups are pellet on pellet at 50 Mts. I use jsb knockout slugs with decent accuracy, about 0.75" CTC groups. to be honest I think need some love on the magazines (they are ok, just feels so cheap and generic), one of my friends use it as his field target gun, he tune it down to 24 joules and using JSB 10.34 gr is one of the most accurate rifles I ever shoot, also in .22 is a nice pice of equipment but for bigger calibers my opinion is that the gun is a little under power. Important to mention that the .30 caliber at 75 Mts is more accurate than some high power guns such as fx king and brk ghost, all of this applies with no wind once the wind pass the 5-7 kph the groups start to open.
