Thread: Is it Pressure or Powder Capacity?

Originally Posted by Marty Henry

the answer is I guess the amount of powder, the temperature it generates, and the volume of gas that has to get out determines how erosive the propulsion is.
All single base powders gram for gram generate the same amount of heat, double base powders generate about 20% more w/w due to the nitroglycerin component, some pics to illustrate this.

This sounds 'correct' as I would suspect it would be the amount, the temperature and the volume. But no mention of pressure?
That raises the question....
- if I was to put a slower single base burning powder than N160 (ie Reloader 26 at the same 60 grain amount) in my 25-06, you say it would be at the same heat, and it would probably be at the same volume....but it would definitely be at a lower pressure as a slower powder.
Would the same amount of barrel erosion occur at lower pressure?

Edit: ok the photos have just attached....I see I have some reading to do...thanks for that info