Neck turning or neck reaming?

NFACurious · December 16, 2006, 02:53 AM

I just aquired a 6mm PPC bolt action. Now after expanding the necks on my .220 russian ammo then mash a .243 bullet in them, i noticed my necks are way to thick. Which is better, run the cases back in the sizing die so the out side of the necks are correct and ream the inside? Or let the expander ball set the inside diameter of the necks and turn the outside? Thanks for your help.

WIL TERRY · December 16, 2006, 12:43 PM

Never had a problem with it either. Do stop and think--THINK--about how much you must take off and WHEN in the procedure. Do write down all the numbers you've obtained so you do not mix 'em up.

cheygriz · December 16, 2006, 08:52 PM

Definitely outside neck turning. Virtually all bench rest shooters outside neck turn. You get a more consistent neck.

IMHO, inside neck reaming is for cases that are shortened and formed to other calibres, where the neck becomes excessivly thick. You're not concerned with precision accuracy with your 7.65 Argentine Mauser and cases formed from .30-06 MilSurp brass, but you are (or SHOULD be) concerned with neck thickness!

amamnn · December 16, 2006, 11:51 PM

If you have a 6mm ppc it seems likely you will be shooting at matches or going for match accuracy. If that is the case, you will want to do both. Neck reaming insures a concentric (with the case body) inside neck surface and outside turning will tailor the neck to your rifle and also aid in attaining concentricity of the cartridge with the rifle.

December 16, 2006, 02:53 AM	#1
NFACurious Member Join Date: December 29, 2004 Posts: 77	Neck turning or neck reaming? I just aquired a 6mm PPC bolt action. Now after expanding the necks on my .220 russian ammo then mash a .243 bullet in them, i noticed my necks are way to thick. Which is better, run the cases back in the sizing die so the out side of the necks are correct and ream the inside? Or let the expander ball set the inside diameter of the necks and turn the outside? Thanks for your help.

December 16, 2006, 12:43 PM	#2
WIL TERRY Senior Member Join Date: July 6, 2000 Location: BLACK HILLS Posts: 1,322	I Have Always Outside Turned As It Is Much The More Accurate Way. Never had a problem with it either. Do stop and think--THINK--about how much you must take off and WHEN in the procedure. Do write down all the numbers you've obtained so you do not mix 'em up.

December 16, 2006, 08:52 PM	#3
cheygriz Senior Member Join Date: May 11, 2002 Location: high up in the rockies Posts: 2,289	Definitely outside neck turning. Virtually all bench rest shooters outside neck turn. You get a more consistent neck. IMHO, inside neck reaming is for cases that are shortened and formed to other calibres, where the neck becomes excessivly thick. You're not concerned with precision accuracy with your 7.65 Argentine Mauser and cases formed from .30-06 MilSurp brass, but you are (or SHOULD be) concerned with neck thickness! __________________ If you think a mighty military force is expensive, wait 'til you see what a weak one costs.

December 16, 2006, 11:51 PM	#4
amamnn Senior Member Join Date: May 13, 2006 Location: WA, the left armpit of the USA Posts: 1,323	If you have a 6mm ppc it seems likely you will be shooting at matches or going for match accuracy. If that is the case, you will want to do both. Neck reaming insures a concentric (with the case body) inside neck surface and outside turning will tailor the neck to your rifle and also aid in attaining concentricity of the cartridge with the rifle. __________________ "If the enemy is in range, so are you." - Infantry Journal