Forming 25-06 from 30-06 for Ruger 1-V

[donzov]

I just got a Ruger 1-V in 25-06 and want to form brass from 30-06. I have a lot of 30-06 brass to work with and want the most accurrate loads possible.
    I already formed 50 pieces by FL sizing them, then trimmed them to a length that I got by using a home made chamber length gage I seen  on varmint als website and subtracting .005. Then I deburred the case mouths and the flashholes. I then finished by neck sizing with a Lee collet die.
    If there's anything I missed or if anyone has any ideas,  please let me know.
   I also have alot of .270 brass, would this be better? I tried one and it seemed the same as the 30-06 but was much longer.
                                                     Thanks, Donzov

[John Traveler1]

You are off to an excellent start in search of accurate loads!  Many shooters would prefer to use only properly headstamped cases, but your plan is certainly "dooable" if you sort ammunition and cases carefully.

.30-06, .25-06, and .270 Win share the basic case and headspace gages.  They differ by case neck diameter and length only.  Any one can be formed into any other.

The cases should be sorted by headstamp and weight for best accuracy.

Make sure that the case necks are not too thick for chambering in your rifle.  This can be done by carefull micrometer measurement, or by inserting a bullet in a fired case mouth.  If it's too tight, the case necks will need reaming.

[Lone Star]

The case necks should be okay, but an easy way to check - besides the bullet in the case mouth - which only warns you after you've already screwed up - is to mic the neck diameter of a fired factory .25-06 cartridge.  If it is smaller than the loaded neck diameter of your .30-06 brass, then you'll need to turn the necks.

 

[donzov]

Thanks for your speedy replies, the case neck thickness was one of my concerns. The formed cases chamber fine but I will use your ideas to check this more closely before I start loading them.
    I sort my brass carefully and have all brands on hand. The ones I formed were federals and wrinkled the necks of 6 of them to get 50 good ones. What brand is best for reforming and just plain reloading?
                                         Thanks, Donzov