This is where most people get stuck, 9 or 11 inch Black coil? It will come down to where you hunt.
If you just read the 9 inch coil bit and thought “That sounds Like me!” but you primarily hunt OPEN areas where there is little to get in the way of the coil. Think open park lands, Farm fields, big dry sand areas, etc.
If you hunt the bush where sticks, grass tufts, logs and other assorted items get in the way go for the 9 Inch!
The 11 inch will give you a slight depth advantage and of course cover more ground.
It is still VERY Fast and can work the trash areas very well, in fact the difference between target separation for the 9 and 11 inch coils is very minimal, they both kill it.
RECOMMENDATION: Go the 11 inch Black coil if your a coinshooter/relic hunter that mainly works the wide open flat areas. You’ll cover about 25% more ground than the 9 inch and punch a little deeper.
However this coil is hard work in the bush and where obstacles are in the way. I NEVER use this coil in any bush setting, it just gets hung up on sticks etc all the time and is harder to jam under loges, grass tufts etc. But thats just me.