Think this one over would ya

[mydogtwig]

I was out doing some reloading for the 25.06.  Great gun, good shooter.  Well this is where the tinkering came into my thoughts.  I have re sized many 30.06 down to fit the 25.06, also have done many .270 down to 25.06 (much more trimming for these)  I was working on the 270' brass while thinking that this perhaps could be converted into 25.06 AI brass.  With a bolt gun, I would need to reset the head space, by removing one thread, to fit the new chamber.    BUT to have the 25.06 AI. on the NEF ultra barrel.  I can not set back the head spacing on NEF barrels.   This is where the 270 cases come into play.  If the chamber is reamed out just a tad longer then the traditional 25.06 AI.  Use 270 brass to fill the gap, thus eliminating short throat's on the 25.06 or 30.06 brass?   Granted it would now technically be a 25.06 AI all the way it would have a slight larger case volume.   Well think that one over for a bit.  I am headed to the drawing board and checking the spec's on 25.06 vs. 25.06 AI, vs 270. 
Any comments on whether it would be do able?  Or should I just get more air to clear out the cleaning solvents in the relaoding area.

[Smokin Joe]

How about the .280? It's a tad longer to the shoulder. 1.948" vs 1.992"

[Mac11700]

You really can't get a perfect AI chamber in a Handi most are a little long to the shoulder but that's ok now these come in just about any caliber from 223 up
http://www.gboreloaded.com/forums/index.php/topic,124004.msg1098432652.html#msg1098432652 no more worries about head spacing issues on rimless cartridges for single shots with the hydraulic case forming die and have your custom FL set done at the same time by them.

Mac

[trotterlg]

I would think that if you cut a 25-06 AI chamber in a 25-06 Handi and then sized a .270 piece of brass in a 25-06 AI die a few thousanths long you would end up with a two sholdered piece of brass that would head space on the false sholder and fire form well?  Larry

[Mac11700]

No...you end up with a rounded (almost a Venturi shoulder) that isn't completely formed...and doesn't chamber well...You can do a false shoulder on the neck...but as to making the brass longer ...how are you going to do that in a 25-06AI die? The length to the shoulder on a 25-06 AI is 2.05"...the length to the shoulder of a 270 Winchester is 1.948"

Mac

[trotterlg]

I would think it would leave some of the 270 neck unsized which would allow it to stop against the AI sholder since the 25-06 neck is smaller than the .270 neck.  Someone run a piece in an AI die and see what it looks like. Larry

[Mac11700]

I would think it would leave some of the 270 neck unsized which would allow it to stop against the AI sholder since the 25-06 neck is smaller than the .270 neck.  Someone run a piece in an AI die and see what it looks like. Larry

Uhhh...it isn't going to actually stop against the AI shoulder because the AI shoulder isn't formed yet...It will stop against the .277 false shoulder on the neck/shoulder junction...and then fill out some...but your still not going to get a good sharp perfect 40 degree shoulder unless you size your case properly to account for any fame barrel gap and seat it hard against the breach face..and jam into the lands...and have the absolute minimum step on the neck...You will need to bump the shoulder back in a full length size die on the next pass with them...

This is the whole reason for the hydraulic dies from Hornady...it totally eliminates anyof this and you can perfectly form your cases with out having to fire a shot...

Mac