This is on the .264 LBC barrrel page. You have a Grendel Type 1 and type 2. Lots of Vendors are selling the Type 2 bolts and BCGs. I purchased my Type 1 from Yong Mfg I am pleased with it. It looks to be a very sturdy bolt.
"We originally made rifles with the standard head spacing (.125”) which we called type 1 and a second head spacing (.135”) only for the original Grendel which we called type II. Given the demand for standardization and lack of sales the type II head spacing has been dropped for 2017.
The problem is solved. The FP was too long. It now runs the way it should..