My son, a Marine in N.C. has a Ruger P345 with some problems. I dosent like to eat any brand af ammo. He shoots Winchester 230gr fmj & it wont feed it very well. I don't know the rate but it is excesive. It does not like hollow point's at all. And it won't lock the slide back after the mag is empty. It's back at Ruger for the third time & they tell him there's nothing wrong with it. Any idea's? He got the gun about the first of this year & of course dosen't have many rounds through it yet.