Ishy 2A Bolt movement on firing

[MVolkJ]

You now need to have the rifle rechecked for headspace; bolt bodies are not interchangable and need to be properly fitted to their individual rifle.

-Mark

Information

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[Edward Horton]

how1erd

Your original bolt and receiver had a oiled proof round fired to stress test the bolt and receiver and also seat the the bolt lugs.

Your original bolt and receiver are a matched pair and have been polished smooth from use. Your new bolt isn't moving or jumping upward because its bolt lug surfaces are rough and are "non-matching" to your receiver.

Put the original bolt back in and test it for bolt jump with the new firing pin spring and extractor spring. When the bolt is cocked the firing pin spring is pulling the bolt to the rear and the extractor spring is "pushing" the bolt to the rear and both are putting closing force on the bolt lugs.

When you pull the trigger the cartridge goes "bang" and then the bolt has 49,000 PSI pressing against it keeping it from moving. The bolt CAN NOT move until the chamber pressure is relieved and the bullet has left the barrel.

A scientist was doing tests on frogs, the scientist put a frog on a table in front of him and then slapped the table hard and the frog jumped.

The scientist wrote in his note book, "loud noise caused frog to jump".

The scientist then surgically removed the frogs left rear leg placed it on the table and slapped the table again.

The scientist wrote in his note book, "removing the frogs left leg and load noise caused the frog to jump to the right."

The scientist then surgically removed the frogs right rear leg placed it on the table and slapped the table again and the frog didn't jump.

The scientist wrote in his note book. Upon removing both rear legs the subject frog went deaf.


Moral of story, don't get froggy with your bolt until you understand why it jumps.

The above story is from my new Enfield novel called "How to explain bolt jump without angering Thunderbox"