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Hello folks,

Straight cases are better than bottle neck cases where doubles are concerned except for loading and especially extraction.
Bottle neck cases exert more breech pressure than straight wall cases.
The faster the rise and fall in pressure the better.
Slower powders even at lower pressure can have an effect on the action (Pressure curve of long duration) ie. opening due to bending about the hinge axis. hence a case for the third fastner, Hidden or otherwise. ,
Tom

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May I respectfully enquire as to the sources of the data you have used to make those sweeping statments please.
As I am thinking of switching from H4831 to Bullseye so that the pressure rises really fast and then falls even more quickly as it blows the side of the sodding chamber open.

Regards

Post Extras