No1 Mk3 barrel up pressure testing?

[RJW NZ]

So I'm about to check my No1Mk3's for correct up pressure and foresee an issue that I've not seen the answer to.

Do I test the up pressure with the nosecap off? I've seen comments that suggest that the upper section of the barrel should rest/lay in the bottom of the barrel channel. If its resting lightly, then a slip of paper won't be trapped under it, it will come free, showing no up pressure working on the barrel. Am I correct in thinking the barrel should be firmly on the wood and require its 3-7 lbs up up pressure to lift away from the wood?

And associated with this, as a no1mk3 nosecap slides on, at least on my rifles, the barrel is about 3/16th inch below the nosecap hole, and pushing the nosecap home lifts the barrel that 3/16th inch, and away from the wood of the forend. Doesn't this change or add to the up pressure working on the barrel?

If the barrel is laying lightly in the barrel channel, is it the lift into the nosecap that creates the up pressure?

thanks RJW

Information

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[Thunderbox]

In standard No1 bedding, the barrel should lie flat in the barrel channel without any springing up or down - unlike with the No4.

The eventual spring in the No1 barrel is created by the spring stud pushing the barrel up slightly, with the nosecap aperture pulling the barrel down again - against that same spring stud. The actual amount of "pressure" is tiny, nothing like the 5-7 lb of the No4.

With the spring stud in place and inner band just biting, the crown of the barrel should be about 1/16" to 2/16" "too high" for the nosecap aperture when the nosecap slides on and pushed the stud spring up. E.g. the barrel travel is only the amount of the stud spring.

Sounds like your forend has been channelled out towards the muzzle, and the action & barrel not seated correctly.