Any cure for bolt lift?

[Alfred]

Don't know what else to call it.
The fairly common tendency for an enfield bolt handle to lift a few degrees when the striker goes forwards whether dry firing or with a round chambered.

Of three Enfields only my 1915 No.1 ebhibits any noticable lift.
It has the original numbered bolt body.
My No.4 and a Lithgow 1944 both have new condition replacement bolts on worn receivers and neither exhibits any noticable lift when fired.

Is there a explanation for why this takes place, and is there a fix that doesn't require a new bolt body?

The 1915 has good head clearance and bolthead over travel is with prescribed limits.
The locking surfaces show equal bearing.

The track of the guide rib does seem to be a hair wider at the rear than at the charger bridge.

There does not appear to be any sloppyness to the fit of bolt body to receiver.

Information

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