What kind of ammo did you shoot in it? It fires .303 Britishicon, and if it did that to the case, I suggest you refrain from shooting it. It apparently is not safe. You might part it out, and make more than your $7.50 investment.
That is a complete fallacy. The 1905 is very strong and completely safe to shoot.
Rossguy said it correctly. Only an incorrectly assembled bolt on a Mk III/1910 action was dangerous, assembled correctly they are extremely strong.

The chambers were reamed out to make the rifles more reliable with out of spec British ammo, the fact that the case expands when fired is not dangerous or unsafe.
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