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Magnum Mini?

2383 Views 21 Replies 9 Participants Last post by  Abendicum
Is it possible to ream the chamber of the Mini-30 to a more powerful .308 cartridge? I Know that the magazine length and head diameter are the limiting factors so I was specifically thinking in terms of a 7.62x39 improved for possibly 200 or so more fps. Anyone ever heard of this being attempted?
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One of the most accurate cartridges ever designed is the 6ppc... Shoots under 1/2 MOA !!! The same bolt on a mini-30 (parent cartridge 7.62x39mm) shoots a 6mm 70 grain bullet at 3000 fps. Brass is necked up from a 220 Russian but you can make 6ppc from 7.62x39mm too... It just takes more steps... 6ppc has won more bencrest competitions than all other cartridges... chamber pressures for 7.62x39mm and 6ppc are about the same no safety problems !!! AB
The standard way the benchrest boys do it is with 220 Lapua brand cases. Forming is a one shot die which "bumps up" (opens the diameter of the neck of the brass from .220 to .243 size bullets... The shoulder and all the rest of the brass is already formed when you buy the 220 Russian cases...

(ALL BRASS is FIREFORMED to it's chamber after ANY brass is fired from any reloadable brass... in any firearm!!!)

The neck outside diameters are turned slightly to fit your chamber and increase accuracy... There is no more case prep after 1st firing than any other reload process... You can order the brass already prepped and turned... Brass life is as long as any other reload 25-50 chamberings and some guys say they never wear out... AB
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