The Firing Line Forums - View Single Post

Bart B. · September 28, 2013, 07:10 AM

Depending on how much smaller a full length sized case is in volume than a neck only sized one, there can be as little as a 1% change in capacity. Few, if any, full length sizing dies return a case to its original, new and unfired dimensions. And in my experience, new cases give better accuracy than neck only sized ones.

I agree that doing your own testing is the only way to know.

But run the same test a few times. If the results are not within 10% of each other, it's not a good test. Good tests of rifle and ammo accuracy give close to (within 10%) the same results all the time.

September 28, 2013, 07:10 AM	#15
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Depending on how much smaller a full length sized case is in volume than a neck only sized one, there can be as little as a 1% change in capacity. Few, if any, full length sizing dies return a case to its original, new and unfired dimensions. And in my experience, new cases give better accuracy than neck only sized ones. I agree that doing your own testing is the only way to know. But run the same test a few times. If the results are not within 10% of each other, it's not a good test. Good tests of rifle and ammo accuracy give close to (within 10%) the same results all the time. Last edited by Bart B.; September 28, 2013 at 08:55 AM.