Headspace measurement

[Brenneke]

You have to look at the contact surface where the lugs engage. If it is indented, there is lug setback.

The mating surface must be visually inspected.

This is extremely unlikely, but always a good idea to have a competent gunsmith, who knows what to look for, give you a health check.

As a rough estimate approximately how much should this cost ?

[414gates]

Cost should be per hour, gunsmith rates vary.

It's a one hour job to remove the barrel, inspect, photograph, replace the barrel, and confirm chambering with a headspace gauge.

If you ask on the forum for recommendations in your area, you should be on the right track.

Even if there is no lug setback, just confirming the barrel fit with a headspace gauge eliminates one more variable.

[driepootx]

I would guess at R500.

[Brenneke]

Thanks a lot guys
Much appreciated

[AJR]

I can report a very satisfying 12mm 3 shot group, in fully resized brass (but not bumping the shoulder back). Hornady 154 interbond in once fired brass with case shoulder datum at 54mm, case OAL of 64.3mm, speed 2555fps, with a 14fps spread over 6 shots. All cartridges chambered with a slight tension on closing.


(I referred to "fresh" brass as new brass 414.)

I think I can get a bit more mileage out of the old girl, yet.

[414gates]

I think I can get a bit more mileage out of the old girl, yet.

Good to hear of pleasing results.

Keep careful track of the trim length.

[DaavG]

fully resized brass (but not bumping the shoulder back).

I maybe missed it thi trhead, but how do you fully resize but not bump the shouler as surely it changed the entire case dimension back to "fresh" brass specs or have I missed something?

[driepootx]

Shoulder is not pushed back as a partial FL size means not all of the neck is sized and the shoulder does not make contact with the die.

[DaavG]

Shoulder is not pushed back as a partial FL size means not all of the neck is sized and the shoulder does not make contact with the die.

Yes that's how I understand a partial resize i.e. neck sizing and slight shoulder bump back but a full resize is all aspects of neck, shoulder, body being resized?

[414gates]

Yes that's how I understand a partial resize i.e. neck sizing and slight shoulder bump back but a full resize is all aspects of neck, shoulder, body being resized?

A full length Sizing Die will modify the walls, neck and shoulder. You can control how much you push the shoulder back. The die by default must at least touch the shoulder, therefore the neck is sized. If you have partially sized the neck, you haven't touched the shoulder, and you have wasted your time. Either full length size, or neck size, but this partial neck Sizing is neither.