They do have the 25 degree bevel but the KME broadhead sharpener is more than that,maybe 30 degrees.The Grizzly is also over 3" long so you need a wide stone.I think Ron usually recomends the knife sharpener for them.Having said that,I have been sharpening the Grizzlies using the Broadhead sharpener and a 3"X8" DMT diamond stone and it is working well but there is a slight compound edge like on most knives.It would be a good idea to talk to Ron.
I have been using the new 200 Grizzlies and they are much improved.A lot of broadhead for the money.