inferno89:
But i can only get outside the front door, before the transmission fails, which is only about 10m away from the master.[.....]
Am i missing something here, or should i look to an alternative solution?
You should check the range with both modules outdoors with no obstructions before wondering about range in more difficult circumstances.
I have had the low power nRF24s (with PCB antenna) working at 110m outdoors and I checked another pair last week at 30m outdoors (I did not need any greater range on that occasion and I did not have space for a very long test).
Assuming they are working OK outdoors the things to consider for indoors (or in/out) include what obstructions are in the way and what other 2.4GHz wireless devices are working in the vicinity.
If there are other 2.4GHz device nearby try changing the channel on your nRF24s.
...R