My .25 Crown is more consistent @ 100 yards with the MKII's, (The MKI's didn't fit in the mag very well) at 50 or so it don't seem to make a lot of difference. They say a new liner is coming out for the 34 grain pellets. I don't know how that liner will improve the accuracy that for me is already really good. The MKII's are 100FPS slower at 25 grain settings so I made 2 shoot cards one for each. All the people here are very helpful Sharkman, I read and watched EVERYTHING related to this gun before buying it. I will offer you this advise if I may. Everything you read about settings,tuning,adjusting, ect ect ect? use as a guide. Your gun will be a little different. Make sure you note or take pictures of the guns factory settings. Then clean it up and shoot several hundred rounds to let the reg and everything to settle in before you begin playing with the settings. You will need a chrony no exceptions, if you want to get the most out of the Crown. Your gonna love this gun!
Aim small miss small
Dennis