My experience of .50 is that you have to run it at a higher fps for it to be viable. We run ours at about 320fps and that seems to give it reasonable range (still not as good as .68 though). cant say i have experienced the accuracy issue and if anything I would have said it was very accurate up to about 40 metres. The paint we use is the GI Milsim tourney grade as the field grade was awful. The problem with a smaller ball is that tollerances in terms of ball quality have a bigger effect and if you understand the physics a smaller mass of object will bleed speed (fps) of more quickly than a heavier object hence the lack of range with .50. Haviung said all that we think .50 is a good product but you have to accept that it has advantages and disadvantages over .68. In terms of rental play most rental customers would notice little difference, in terms of experienced scenario players, well you would be at a significant disadvantage in terms of range and ball breaks against .68.