Building a repo no.4 sniper, I have a problem!

[tbonesmith]

I had this issue recently and used a 10mm and 8mm carbide end mill to create a stepped hole in the position, into which I (soft) soldered a mating plug of silver steel, which I then drilled and tapped as usual.

I know what you mean about hard, good luck getting through without carbide, and buckleys of tapping it if you do. I hope the attached photos help.

Be very mindful of where things are in relation to the locking lug recess when over-drilling this location.

Attachment 90661Attachment 90660Attachment 90659Attachment 90658

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[wazz]

I had this issue recently and used a 10mm and 8mm carbide end mill to create a stepped hole in the position, into which I (soft) soldered a mating plug of silver steel, which I then drilled and tapped as usual.

I know what you mean about hard, good luck getting through without carbide, and buckleys of tapping it if you do. I hope the attached photos help.

Be very mindful of where things are in relation to the locking lug recess when over-drilling this location.

Attachment 90661Attachment 90660Attachment 90659Attachment 90658

Thanks Tbone that's very helpful I will give it a go.