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Old 06-22-2019, 10:18 PM
DittoHead DittoHead is offline
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Join Date: Sep 2006
Location: Central Virginia, U.S.A.
Posts: 832

Originally Posted by Teddy Bear Rat View Post
Just measured the bolt and receiver on both rifles. The newer English walnut rifle is larger by this much:
Loading port: .152
Bolt notch to front of receiver: .170
Bolt: .230, but some of the difference is sunk into the receiver ring.
Handle front to rear of locking lugs: .175
Receiver ring : same
So, barely 1/8, maybe not worth worrying about.
The M38 action was originally designed for cartridges based on the Hornet case. Later it was modified to accommodate cartridges based on the Fireball case. In addition to the dimensional changes, the lugs were beefed up to handle the higher pressure.
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