Gents. Could you please help with a question i have been thinking about please? Does using the Ackley Case result in less pressure than the parent case when giving identical performance? For example.. Does a 25-06 AI using H4831 propelling a 100 grain bullet to 3200fps develop less pressure than a standard 25-06 using same powder and bullet to same velocity? Everything else being equal also. Many thanks for any thoughts you could offer on this. Has there been any pressure testing been done on this? Brit.