expanding for a false shoulder

[762plinker]

so i have done this for my dasher , so i know the process, but not the size for my current project.
i have a 6.5 gt( a 6gt necked up), and with some discussion elsewhere it has been suggested that i use a false shoulder to fire form this brass.
soo 6.5/.264 up to ??? is .270 enough or do i need to go to 280/7mm ?
thanks

 

[moajoe]

I used a 6.5 expander mandrel to put a false shoulder on my 6br brass to fire form to 6 dasher. So you will be expanding from 6.5 to 6.8. Then you will need to squish part of the neck down to 6.5 again. Should work. Try a few then chamber the unloaded case with the firing removed from your bolt to feel for good contact. I would say that the less you expand to achieve your result the better.

You could try loading long with a hard jam in place of expanding the neck for a false shoulder. Be aware of the powder charge as the pressue would increase with a jammed bullet.

 

[762plinker]

ok i would try the 6.8...but my search has produced no results...anyone with a 6.8 source suggestion

 

[358WCF]

If you dont have the proper size expander in a die set, K&M may be the cheapest alternative. A V1 press adaptor & a 270 tapered expander will cost you under $30... + shipping.

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[SKWERLZ]

I used a .257 expander for my 6mm
I’d think a .277 would be enough for a 6.5.
21st century or brownells

 

[762plinker]

yes i can get the 270 but was looking at the smaller 6.8 or is that just noise

 

[SKWERLZ]

yes i can get the 270 but was looking at the smaller 6.8 or is that just noise

6.8 has a .277 bullet diameter just like 270.

 

[762plinker]

yes i just did a bigger search and found that out...thanks all