Modifying Actions, Safely

[Alan de Enfield]

Personally I would not use an Ishapore for a 308, it is (as it says on it) it is designed for the original 7.62 NATO round (144-150 grain).

The Ishapore Proof Master wrote an article some years ago about how the proof testing of the No1 Mk3, when converted to the 7.62 resulted in the action twisting and jamming the bolt, 1000's of rifles had to be rejected and scrapped. the proof test was subsequently 'modified' so that the rifle passed proof testing, but it is very marginal.

Using 308, or even 'modern' heavier 7.62 loads will put the action under extreme stress with a high chance of failure.

If you must use 308 then 'roll your own' with a 144 grain bullet and a 'light' powder load.

The 308 and 7.62 have different headspacing, and the 7.62 case is much thicker and heavier than the 308 case, using 308 cases in a 7.62 chamber can result in case failures.

IT says '7.62' on the rifle, why would you use anything else ? If you car says use 'Gas' would you fill it with Diesel ?