This morning I was sighting in my grendel pistol and rifle. The pistol I have shot a fair amount and after some initial feeding issues have had no problems, I made some adjusts that made me move the scope forward, which is why I was re-zeroing it.
This was the first time I had shot the rifle as I just got the scope for it. The first 3 shots were fine except that they were way low, off the whole target at fifty meters, so I had to move closer. After these shots, the rifle started to malfunction, either partially chambering a round and locking halfway open, or not picking up the next round at all. The magazines I used worked fine in the pistol. I noticed that the bolt was barely locking back on the last round, I could pull out the magazine, but any other slight movement would cause the bolt to close. I switched out the buffer and buffer spring with one I have used in a .233 AR for years and now it is functioning fine. I initially used Wolf ammo to get as close as possible and then finished up with PF loaded 129 gr ABLR which will be my hunting round. The reason I am posting this came up as I was cleaning up the steel cases from the wolf ammo. I noticed that some had split just below the neck. I've never noticed this before when shooting the pistol with wolf ammo. Has anyone else noticed this with the wolf ammo? Would it be caused by some rounds being loaded too hot? I've seen split cases before with worn out brass I had reloaded several times before (in other calibers, not grendel) but never in once fired cases, steel or brass. Could there be something wrong with the rifle causing this? It is an 18in CORE15 upper. IMG_6076_1500x1500.jpgIMG_6073_1500x1500.jpgIMG_6077_1500x1500.jpg
This was the first time I had shot the rifle as I just got the scope for it. The first 3 shots were fine except that they were way low, off the whole target at fifty meters, so I had to move closer. After these shots, the rifle started to malfunction, either partially chambering a round and locking halfway open, or not picking up the next round at all. The magazines I used worked fine in the pistol. I noticed that the bolt was barely locking back on the last round, I could pull out the magazine, but any other slight movement would cause the bolt to close. I switched out the buffer and buffer spring with one I have used in a .233 AR for years and now it is functioning fine. I initially used Wolf ammo to get as close as possible and then finished up with PF loaded 129 gr ABLR which will be my hunting round. The reason I am posting this came up as I was cleaning up the steel cases from the wolf ammo. I noticed that some had split just below the neck. I've never noticed this before when shooting the pistol with wolf ammo. Has anyone else noticed this with the wolf ammo? Would it be caused by some rounds being loaded too hot? I've seen split cases before with worn out brass I had reloaded several times before (in other calibers, not grendel) but never in once fired cases, steel or brass. Could there be something wrong with the rifle causing this? It is an 18in CORE15 upper. IMG_6076_1500x1500.jpgIMG_6073_1500x1500.jpgIMG_6077_1500x1500.jpg
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