265bhp is more like stage 2 turbo back power output.
290-300lbft is easy from a stage1 on stock exhaust if the power is comming in around 3000rpm with an agressive N75 map, then the 5252 dyno rule helps the numbers, ie the earlier the peak torque in the rpm range the greater the peak torque number for less combustion effort. Its the higher flow that an issue with the stock exhaust and ko3 turbo, 240bhp is a realistic number imo
Your dyno graph is giving 60bhp for transmission losses?? Thats 30% of drive train loss added to the wheel power of 199hp, ( you could have a sticky front brake?)
have you a graph of your stock power run or do you know what it ran stock?
K03 Tfsi I tend to see 225whp works out to around 258-260hp at the fly wheel which is around 15% losses for a 4th or 5th gear run.
But with ALL dynos its a lottery with numbesr, what counts is that your happy with the seat of your pants butt dyno results.