To get better range and fps you will likely want to:
- swap the bucking for flat-style bucking, W-hold, R-Hop, (or similar),
- increase spring power,
- use slightly heavier BBs.
The stock TM barrels are likely very decent, so really, just clean them and leave them stock. Focus on spring power, a quality bucking, a clean barrel, and strengthening anything that might break as a result of a stronger spring. Don't waste your money on tightbore barrels until you've fully explored other avenues of quality compression and have assured durability under higher power.
Now you know