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Jimro · June 14, 2013, 01:48 PM

What should it be? Depends

How do you measure it? Either in how much the brass is smaller than the bullet, or how much pull you need to unseat the bullet with a puller.

How much of neck tension is in the uniformity of the brass? That is why people neck turn.

Can there be none with a light crimp to hold seating depth? Never tried that.

Is any type of crimp always detrimental? Depends

All my accuracy loads solely use neck tension, even in AR-15 loads. Bart B. has explained the method of using "gelded" dies to get best accuracy, and it is worth reading. You don't need to do that to get MOA or tighter ammo, but for max accuracy I think it is well advised.

Also, some shooters will load single shots with zero neck tension, I think it is still pretty common with the old "shutzen" match shooters (or it was common back in the day....)

Jimro

June 14, 2013, 01:48 PM	#2
Jimro Senior Member Join Date: October 18, 2006 Posts: 7,097	What should it be? Depends How do you measure it? Either in how much the brass is smaller than the bullet, or how much pull you need to unseat the bullet with a puller. How much of neck tension is in the uniformity of the brass? That is why people neck turn. Can there be none with a light crimp to hold seating depth? Never tried that. Is any type of crimp always detrimental? Depends All my accuracy loads solely use neck tension, even in AR-15 loads. Bart B. has explained the method of using "gelded" dies to get best accuracy, and it is worth reading. You don't need to do that to get MOA or tighter ammo, but for max accuracy I think it is well advised. Also, some shooters will load single shots with zero neck tension, I think it is still pretty common with the old "shutzen" match shooters (or it was common back in the day....) Jimro __________________ Machine guns are awesome until you have to carry one.