04-15-2022, 12:40 AM
Sm,
Yes, it's pretty high. If that velocity is correct and we know it's only an estimate, it will be an overload. If true, your gun is being hammered. The weakest link in AR's are the bolt lugs which will likely crack sooner or later. Unfortunately, AR's are not as robust as bolt guns, which means they are not as forgiving to overpressure.
Be also aware, in this calibre overpressure can occur before typical signs like flattened and cratered primers. Like the 338LM the Grendel case is designed to take more of the pressure share than other calibres. But the pressure is still there; pounding the bolt lugs even though the spent cases look OK.
Yes, it's pretty high. If that velocity is correct and we know it's only an estimate, it will be an overload. If true, your gun is being hammered. The weakest link in AR's are the bolt lugs which will likely crack sooner or later. Unfortunately, AR's are not as robust as bolt guns, which means they are not as forgiving to overpressure.
Be also aware, in this calibre overpressure can occur before typical signs like flattened and cratered primers. Like the 338LM the Grendel case is designed to take more of the pressure share than other calibres. But the pressure is still there; pounding the bolt lugs even though the spent cases look OK.

