I have bought 3 of t...hese now and fitted to a 2240, 2250 b and my 2250 xl with a steel breech. The probes do not cause any problem for loading except the steel breech xl using BSA Max pellets. These are quite long and a bit fiddly to load but normal types like the crossman ammo no problem at all. The plastic breech 2240 and 2250 b though have no problem to load anything. IMHO they have improved accuracy and worth checking out other mods to increase the power. I recommend use a chrono though to make sure you keep below 6 and 12 ft lbs if you do not have an FAC. I gave 4 stars only due to the long pellet in my XL a bit fiddly.
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