Setting firing pin protrusion on the Mosin should be done so that the pin won't fit under the 75amd just clears the 95.
If it won't clear the 95 gauge then you have it screwed out too far. Rotate the firing pin with your tool, the last notch will fit the flat part of the firing pin, and keep backing it down until it will clear the 95 notch.
Read the instructions on the following site.
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