Thread: High Pressure signs?

Originally Posted by janleroux

Hi @Cordite, that is interesting comment you made that I did not know - so are you saying that you could run into over pressure if you under load as well? Is it because there is not sufficient pressure to move the projectile out of the barrel and you have pressure peaking somewhere during the process?

Sent from my iPhone using Tapatalk

Something to do with a standing wave set up, returning and detonating the unignited portion. It is dangerous to have as it is a detonation, not a combustion, and double base powder is basically the same as gelignite albeit in different proportions, nitrocellulose and nitroglycerin. We are talking blown up guns here.

Anyway roughly how much percent of the case space under the bullet is taken up by your charge? 40 grain does not sound like underfilling.

Someone here may have some calculator software to tell you what pressures to expect from that load.

Originally Posted by Cigar

Do you mean H4350? According to ADI website this is the equivalent of AR2209. It appears H4320 doesn’t exist, though there is IMR4320, which ADI reckon is close to AR2208.

Apologies - finger trouble. Yes, it is H4350.


Sent from my iPhone using Tapatalk

Originally Posted by janleroux

Apologies - finger trouble. Yes, it is H4350.


Sent from my iPhone using Tapatalk

It was 10-ring I was querying about whether he meant H4350 as he was saying H4320 throughout his post, and it was my understanding that 4350 was 2209, and my checks seem to confirm that. That’s why I quoted his post, not yours...

Originally Posted by Cigar

It was 10-ring I was querying about whether he meant H4350 as he was saying H4320 throughout his post, and it was my understanding that 4350 was 2209, and my checks seem to confirm that. That’s why I quoted his post, not yours...

No probs. It sounded like a typical mistake I would make.


Sent from my iPhone using Tapatalk

looks fine, are you loading to factory OAL or seating deaper or prouder ?

Originally Posted by gonetropo

looks fine, are you loading to factory OAL or seating deaper or prouder ?

For now just sticking to the factory OAL. I will play around with the OAL once I have the speed under control. Hopefully by playing with the jump off the lands I will be able to get a sufficient speed as well as less than 0.5 moa grouping - that will be happy days if I can achieve that.


Sent from my iPhone using Tapatalk

The face of the primers could also be flat. They still look smooth and rounded.


Sent from my iPhone using Tapatalk

Sent from my iPhone using Tapatalk

Originally Posted by Burb122

Sent from my iPhone using Tapatalk

Which brand of primers are these?


Sent from my iPhone using Tapatalk

Originally Posted by janleroux

Which brand of primers are these?


Sent from my iPhone using Tapatalk

Bet the one on the left was "biffy"

Originally Posted by Burb122

Sent from my iPhone using Tapatalk

Yes...when the edges become sharp, you attach a string to the trigger and let the other 5 off from a hole in the ground. I blew a 44 mag back in the 70's.