try this instead!
Prop damage?
Usually caused by people raised (aka "taught to fly") at a capital city where loose stones are unheard of!
Before spending many $1000s on new props that MAY help try:
1. Not hitting 1500RPM on start
2. Hold elevator full back always (yeah I know except with a howling tailwind...)
3. Run up into wind on a clean area (and into wind so that full back elevator does more to raise nose - may also help with cooling).
4. SLOWLY increase power on takeoff!! (I have actually had people stand on the brakes, increase power to almost full then release brakes "..because thats what the p chart said.." - if it is a truely short runway you may have to but otherwise......).
The usual result of poor handling is stuffed props!
I operate commercially on a mixture of gravel and bitumen with lots of loose stones in a mixture of singles between 150hp and 310hp (and the odd twin) and very very rarely get ANY stone damage. Yes it does happen but not common...
So Dear OZ GRADE 3 If any of your guys are do any of items 1-4 you may have a very cheap solution to your prop problem - STOP DOING DUMB THINGS!