Question about Win M70 Classic barrel-fitting

ObiJohn

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I have an ARC Mausingfield that takes Savage small shank barrels. Unlike the Win M70 pre-64 and Classic actions, this doesn't have an extractor slot cut into the barrel. Why does this work in this rifle but the M70s have to have extractor relief? Could a M70 barrel be made with the same breech as a Savage barrel and work? Is it the specific design of the Mausingfield's claw extractor... and could a revised M70 extractor along those lines allow for eliminating the extractor cut?
 
Extractor cut is needed because of the coned breach.
Many later Mauser copies do not require the extractor cut because the breach face is flat, Ruger, CZ/Brno, Sako and Browning come to mind.
Of course, you cannot use a flat breach face in a Win Model 70 without serious re-designing.

Cheers.
 
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