Can anyone identify these old-stock arrow shafts?

[Archie]

I came across some arrow shafts from an old archery shop inventory, and don't know what they are.  I don't know how old they are, either.  

This is the piece of paper that was wrapped up with them:
 

On the shaft is stamped "Magnum .328", and what I think is the Easton logo.  They are 32" long uncut, and swaged on the nock end.

Can anyone help me?  Thanks!

[Hobow]

Archie, the Magnum .328 were X7 alloy shafts made for Bear Archery by Easton.  In the 1972 Bear catalog it says; "Magnum arrows in .324 and .328 are available on special order.  The 29" .324 arrow weighs 625 grains; the .328 weighs 655 grains.  These heavier shafts are recommended for 65 lb bows and up.  For Magnum shafts in other than 29" or 31" please allow two to four weeks for delivery.". That is a stout and relatively uncommon shaft.  

Their .320 shaft was rated for 70/80 lb bows.
.316 for 60/70 lb
.312 for 50/60 lb
.308 for 40/50 lb

I like the regular Magnums, never seen any heavier than the .320's.   I think it's a cool find!

Hope this helps,

Brad

[Hud]

Bear had Easton build the X7 in the Magnum 312, 316, 320 and 328. The spine is in the range of 75-85#. It is a very hard alloy, tan in color.  They are very hard to find. The Magnum series was replaced by the Metric Magnum. You need a special cut-off saw to cut them.

[Archie]

I just double-checked, and there are 2 different sizes in my "find", .324 and .328.  

And they are really stout shafts, too.

I have 2 dozen of each.  Is there a market for them??

[JimB]

I bet there would be a market.I used to have 16 of the .308's.They were great shafts.I didn't realize they had made them that heavy.I bet they would go like hot cakes.Super neat find.