>>49311996> I can’t see how the primer could “skip” through the powder at the base and somehow ignite the front and not ignite the back.
There is no powder at the back in this case, it's all settled at the bottom, because it has room to move and the case has been horizontal for some time, likely exposed to recoil, settling the powder at the bottom. Pic related.>If it did, there was so little powder that it’s basically a squib load.
This may be true for a rifle load, but it's not uncommon for pistol cartridges to be loaded with a very low casefill percentage like this. Pistol powders can then still provide a strong enough, fast enough ignition to propel the bullet at good velocity.>Or the powder at the base was wet and didn’t ignite, which is a completely different issue of compromised powder.
Yeah, we can discard that option as causing excessive pressure.