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<font size="+1"><font face="Comic Sans MS">Thanks, I've seen those.
I am thinking of shrinking the end of a tube. It would look
like the end of a high powered rifle cartridge. I think it's
called a bottle neck.<br>
I've reloaded ammo and it's easy to run a die down on a brass
cartridge. Tubes don't have a base to resist the pressure so
you would have to figure out a way to hold the tube. I have
some 5-c collets that might work, they go up to an inch. Also
how much I can reduce aluminum with out cracking it is unknown
to me. I'll have to play around with some dies.<br>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:lstoskopf@cox.net">lstoskopf@cox.net</a> wrote on 1/16/2017 3:49 PM:
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<pre wrap="">Harbor Freight has some neat tools cheap to expand tubing. Works well with aluminum. Buy the set. N0UU
<a class="moz-txt-link-freetext" href="http://www.harborfreight.com/catalogsearch/result?q=tubing+expanders">http://www.harborfreight.com/catalogsearch/result?q=tubing+expanders</a>
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