Home Forums Hunting & Shooting Mausers and Military Rifles I made neck sizer die and loaded a 6.5 Vostok

I have the two custom 6.5x54r Vostok reamers I ordered; 1) chamber, and 2) full length sizing reamer.

But I remember what a circus it was getting low runout necked down 6.5-06 brass with RCBS and Hornady dies.

notes:
30-06 brass is 2.494" long max
270 brass is 2.540" long max
6.5-06 brass is 2.504" long max
So 270 brass necked to 6.5-06 needs to be trimmed, but 30-06 brass does not.
270 Win Bonanza FL sizer with .296" neck
270 Win RCBS FL small base sizer with 0.297" neck. This sizes 270 brass neck O.D. 0.300" and The I.D. 0.266" go, 0.267" no go
6.5-06 Hornady FL sizer die with 0.271" neck
6.5-06 RCBS FL sizer die with 0.285" neck
The 6.5 mm bullet is 0.264", so we would like the neck to be 0.263" or 0.262" go
The 260 is 1.776" to the base of the neck.
The 6.5-06 is 2.1763" to the base of the neck.
To use a 260 Lee Collet Neck Die on a 6.5-06, I would want a 0.400" bushing.
I made a 0.387" bushing.
That changes the brass from 0.300" O.D. to 0.292" OD, and from .266" go I.D. to 0.262" Go with 0.003" concentricity
RCBS 6.5-06 sizer changes it to 0.283" OD ID to .253" go with 0.003" concentricity
Direct from 270 brass to 6.5 in the RCBS 6.5 [produces 0.006" concentricity and the trim die pilot scratches the inside of the neck.
30-06 brass to RCBS small base 270 die to Collet die does not require trimming, but has 0.010 to 0.020" runout in concentricity gauge.
30-06 brass to 6.5-06 RCBS die does not require trim but has 0.0045" run out
The necked down 30-06 brass is the same neck wall thickness as necked down 270 brass, revealing a common ancestor.
Previous 30-06 brass was low quality.
LC brass direct to 6.5-06 RCBS die has 0.001" runout.
Settled on 30-06 brass from St Marks , size with RCBS 6.5-06 lots of lube and rotate, RCBS 270 small base, and RCBS 6.5 again. Then chamfer. 3.34" feeds, 3.506 jams in the lands and extracts with 142 gr Nos accubond moly

As KP231 says, just run the brass through the die. I just have not reamed the die yet.


6.5x54r chamber reamer, FL sizer die reamer, 260 Rem die blank made of 4140.