Stuck Case in Chamber

[cajun]

I can get the bolt being hard to close due to not pushing the shoulders back enough. But I'm not sure that would account for the extra pressure. I guess possibly if the case could not move forward at all it could drive the case into the bolt face. Did you fire some of the other properly sized rounds after this? The other thing I have seen cause pressure out of the blue on a previously safe load is a carbon ring. It will build up and then suddenly your normal load is showing pressure signs. This can be dangerous if you are already running really hot.

 

[FireFlyFishing]

@FireFlyFishing i really didn't ask for advice or help regarding my load dev practices. It was a question about the missing part on bolt face

And yet, your loading practices could be the culprit to your original question about broken parts on your rifle.

What brass are you running? If you have thick brass you may need to download even further.

 

[DirtNap35]

And yet, your loading practices could be the culprit to your original question about broken parts on your rifle.

What brass are you running? If you have thick brass you may need to download even further.

ADG. When I was going through my virgin brass I did a pressure test and I took it to 60.4 before I got a hard bolt lift. Tomorrow I'll be running 10 shot groups of 58.6, 58.9, and 59. 59.2 is where I got the case stuck last week. Tonight I'll clean the barrel and action really well.

 

[cajun]

ADG. When I was going through my virgin brass I did a pressure test and I took it to 60.4 before I got a hard bolt lift. Tomorrow I'll be running 10 shot groups of 58.6, 58.9, and 59. 59.2 is where I got the case stuck last week. Tonight I'll clean the barrel and action really well.

Viht lists 55.9 with that powder and the 156 berger as max at 2815 with a 24" barrel. So yeah your a little over max lol. Fyi the powder manf's do pressure test their data.

 

[DirtNap35]

Viht lists 55.9 with that powder and the 156 berger as max at 2815 with a 24" barrel. So yeah your a little over max lol. Fyi the powder manf's do pressure test their data.

All reloading books have to be conservative for legal purposes. Need to keep in mind that Viht is running saami length of 2.953 and I'm running 3.042 overall length which has a huge impact on pressure.

 

[FireFlyFishing]

All reloading books have to be conservative for legal purposes. Need to keep in mind that Viht is running saami length of 2.953 and I'm running 3.042 overall length which has a huge impact on pressure.

Take a look at ADG's website. They recommend downloading published loads by 10%.

 

[DirtNap35]

Take a look at ADG's website. They recommend downloading published loads by 10%.

Yeah I'm aware of that but take it with a grain of salt. For example as previous member mentioned max load for Viht is 55, reduce that by 10% and you're at 49.5 and case capacity of like 70%. I assure you nobody on the planet is running a 6.5 PRC with 49.5 grains of powder.

 

[MagnumManiac]

Amazing!
I gave you the answer on page 1.

Cheers.