orch
Well-Known Member
looking for some imput....
trying to reduce my case neck runout on my 25-06 Ackley... i know i shouldnt have even started looking at case neck and bullet runout because this gun was and still is shooting awsome even before i started checking it... but knowing it is there just bugs me
long story short, i'm running my brass through my redding die set... i have the full length and neck sizer die set as well as the conventional seater die for it.... i'm running 30-06 lapua brass necked down to 25-06 and have turned the necks with the rcbs system that reams the inside of the neck at the same time you trim the outer neck... the brass is then fireformed in the ackley...
the fired brass always comes out of the chamber with a concentricity of 0.001" or less with most of them in the <0.0005" range (ie: the needle barely moves as i spin the brass in the concentricity guage)
after sizing in either die i was getting concentricity readings in the neck of any where from 0.001" in some of the brass but in a lot i was getting .004"+ deflection... removed the neck sizer button and low and behold readings back in the < 0.001" range...
i have tried letting the decapping pin/neck sizing rod free-float, i have locked it in while it drags through the neck of a perfectly concentric peice of brass, i have pollished the sizing button with 600 grit sand paper, i have run the button up as high as possible in die right below the shoulder, and have just switched to one of the redding free floating carbide buttons... neck run out still in the 0.004"+ range on most of my brass..
if i just run this stuff through my dies without the expander button in, the necks are about 0.008" smaller diameter then when the neck expander is in...
my question is: if i just seat the bullets in the non neck expanded brass is this gonna cause me more greif because the neck tension is too high?
any help would be appreciated
thanks, orch
trying to reduce my case neck runout on my 25-06 Ackley... i know i shouldnt have even started looking at case neck and bullet runout because this gun was and still is shooting awsome even before i started checking it... but knowing it is there just bugs me
long story short, i'm running my brass through my redding die set... i have the full length and neck sizer die set as well as the conventional seater die for it.... i'm running 30-06 lapua brass necked down to 25-06 and have turned the necks with the rcbs system that reams the inside of the neck at the same time you trim the outer neck... the brass is then fireformed in the ackley...
the fired brass always comes out of the chamber with a concentricity of 0.001" or less with most of them in the <0.0005" range (ie: the needle barely moves as i spin the brass in the concentricity guage)
after sizing in either die i was getting concentricity readings in the neck of any where from 0.001" in some of the brass but in a lot i was getting .004"+ deflection... removed the neck sizer button and low and behold readings back in the < 0.001" range...
i have tried letting the decapping pin/neck sizing rod free-float, i have locked it in while it drags through the neck of a perfectly concentric peice of brass, i have pollished the sizing button with 600 grit sand paper, i have run the button up as high as possible in die right below the shoulder, and have just switched to one of the redding free floating carbide buttons... neck run out still in the 0.004"+ range on most of my brass..
if i just run this stuff through my dies without the expander button in, the necks are about 0.008" smaller diameter then when the neck expander is in...
my question is: if i just seat the bullets in the non neck expanded brass is this gonna cause me more greif because the neck tension is too high?
any help would be appreciated
thanks, orch