Size Whisket Biscuit for Full Metal Jackets??

I just bought a new trophy ridge WB with the medium size disc. Are the FMJ's to small for the medium disc?

 

The general rule of thumb with them, they can be too small, but they really can't be too big. I always used a bicuit insert with the large aluminum hole in it, yet always shot smaller diameter carbons. Always worked great.

 

I agree my friend shoots a biscuit meant for alum arrows and shoots carbons. He drive tacks with it.

 

With the arrow inside the wb, you should see a small sized moon shape space above the arrow.

 

Rick James hit the nail on the head with this one.