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Old August 28, 2015, 07:24 PM   #1
mrappe
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RCBS SB 308 dies for loading match quality ammo

I just started loading .308 again after many years. The only die that I have is a Small base die since I used to load for a Springfield M1a NM but now I don't have that gun anymore but a Savage Tactical in 308. How much would it effect my ammo to use the SB die?

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Old August 28, 2015, 08:50 PM   #2
Mobuck
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Probably not the best choice. Most loaders aiming for top accuracy use neck sized brass if shooting a bolt action. The SB sizer is nearly at the opposite of neck sizing.
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Old August 28, 2015, 09:54 PM   #3
F. Guffey
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Quote:
How much would it effect my ammo to use the SB die?
I have small base dies, I also have BAR dies. I have dies that are mistakes, if it was necessary to reduce the case diameter in front of the case head/above the shell holder I can do that. I do not find it necessary but 'just in case' I have the dies. And I have feeler gages, when sizing a case for a short chamber I use the feeler gage. When I want to know if it is necessary to use a small base die I start with a feeler gage.

Then there is measuring the diameter of the case above the case head. By design I find it impossible to size the case head, the shell holder with a deck height of .125" prevents the die from sizing the case below .125" above the case head + the radius of the die.

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