I have a Marlin 25MN topped with a Simmons 3X9 and I am very pleased with the accuracy. I generally shoot CCI Maxi Mags, but it shoots pretty much all the ammo I have fed it so far. Some folks use the 22 WMR for coyotes, but I feel it is too light unless they are under 50 yards and you can get a good head shot. The cartridge is basically a light varmint round and works best on groundhog sized game and under. I use mine for squirrels mostly and the occasional feral cat or bothersome possum. When you ask about max range are you talking targets or animals? It is a trick to shoot a good group at 200 yards if there is any kind of breeze and on animals it is best at 150 and under. The 22 WMR case is almost twice as long as the 22 LR and is slightly larger in diameter making it unsafe to fire 22 LR in a 22 WMR chambered firearm. Accuracy depends more on the rifle and shooter than the cartridge. It is flatter with a bit more downrange energy but again, it is by no stretch of the imagination suitable for deer sized game.