No4 (T) Collimation Check Using Laser Boresight

[browningautorifle]

I imagine a 1 inch copper tube could be even better

Yes...

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[Gil Boyd]

Not forgetting of course that most telescopic sights were set up at 25 metres, buy heyho thats the Military. My advice is to keep it simple, big sheet of white paper with a black dot in the centre, 5 rounds carefully used and adjust your sight accordingly. Thats all we used to get before a qualifying shoot on a new sighted rifle!

[Surpmil]

Seen the price of copper lately? A No.22 scope will be cheaper.

[browningautorifle]

There are actually a two piece set of centers available for the job. Also a steel round stock that lies in your rings to show true.

[Surpmil]

There are actually a two piece set of centers available for the job. Also a steel round stock that lies in your rings to show true.

Useful if you're setting up separate rings, but in this case the bracket is bored and milled as one piece so the alignment of the two rings to each other is a given. A piece of hardened and ground shafting would be another option for aligning separate rings.

As for boresighting through the rings again, a piece of shafting center-bored for an oil/grease passage would be another option, but again, No.22 is probably cheaper "off the shelf".

[browningautorifle]

Useful if you're setting up separate rings, but in this case the bracket is bored and milled

Right, so in this case useless.