Mar 5, 2012 · The problem isn't if you can force a dented case into the chamber, the problem is the reduced case capacity of the dented case and what the actual chamber will be. By just seating the bullet deeper into the case the chamber pressure can go …

Jun 3, 2009 · H414 is too slow for a 150gn bullet to build sufficient pressure fast enough to expand the case and seal the chamber. Switch to something in the range of H335 or H4895 and I think your problem will go away.

Aug 18, 2023 · Take the stock off and try feeding manually from the mag to test for bullet damage. Possibly the stock is causing mag interference which positions it slightly out of place.

Feb 11, 2013 · The cases are all perfectly fine - it's just the bullet. The picture with 5 rounds showing: the first round is came from one of the boxes but doesn't have the indentation.

Jul 27, 2020 · Bullet setback is actually the most common cause of KB's. The reduction in case volume can dramatically increase pressure, especially with heavier bullets and fast powders.

Dec 20, 2020 · Take a closer look, the bullet is also pretty beat up, no telling where it will go if fired. Get some fresh ammo, fire it, retrieve the cases and see what the look like coming out.

Nov 2, 2013 · Anyone know what is causing these dents? If I put a full mag in and fire off a round then pull the mag, the top shell will have this dent. The lead bullet has no marks on it so whatever is doing this is not affecting the bullet. I did notice the 10 round mags have a plastic tit on the back of them and the 25 round mags have a metal one.

It might have happened when you put the mag in and the first round gets dented. There is a piece of metal that sheers off every new round in the mag after the casing has left the ejection port. If you slam full mags in really hard, they can hit that piece of metal and become slightly deformed.

Jul 4, 2013 · If you are using a thin skinned varmint bullet the circle you mention will be amplified. Compressed loads can also limit variations in seating depth for best accuracy.

Jul 10, 2004 · You might try annealing the cases. Excessive case lube could also be the culprit. I used to neck down .338 Win mag cases to .308 Norma mag. If the dents weren't too excessive, I would let them fireform in my chamber. Sometimes they were so bad, I just threw them away.