Thread: High Pressure signs?

Originally Posted by Cordite

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.

Difficult to give a persentage, but with 41gr I can still hear movement inside casing when I shake it, after I seated the projectile, so I would estimate that I would be able to go to about 44gr before starting to compress.

If I load the case to the brim is takes just a bit more than 47gr in total.


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Originally Posted by janleroux

Difficult to give a persentage, but with 41gr I can still hear movement inside casing when I shake it, after I seated the projectile, so I would estimate that I would be able to go to about 44gr before starting to compress.

If I load the case to the brim is takes just a bit more than 47gr in total.

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That does not sound underfilled. Generally H4350 will have a percentage unburnt powder at the end of it, more used up with heavier bullet loads.

On the face of it it does sound like the earlier advice about something up with the primers.

Here is someone playing with just about your current ingredients: