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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing
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DarylS
.700 member


Reged: 10/08/05
Posts: 26862
Loc: Beautiful British Columbia, Ca...
Re: Proof... once again
      28/10/10 03:57 AM

4seventy's right - no regulation worth while on that proof.

Oiling the brass certainly increases the strain on the breech - but it is not definitve - ie; cannot be controled to produce a repeatable result.
things that change the pressure against the breech: here's some things that change the breech thrust, off the top of my head.
1/. shape of ctg. ie: taper
2/. condition of ctg brass - ie: temper/smooth/rough
3/. viscocity of the oil
4/. amount of oil
5/. lubricity of oil
6/. powder charge and bullet weight of load

I frequently oil ctgs. when firforming. I use a thin oil, like WD40, which has lower lubricity in comparrison to other oils of the same viscocity, even. The incrase in bolt thrust cannot be felt in extraction, buy allows better case forming.

'lots' of oil - a non-compressible liquid - lots? Good grief - are they wishing to ring the chamber?

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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Entire topic
Subject Posted by Posted on
* Proof... once again oupa 27/10/10 09:50 AM
. * * Re: Proof... once again Birdhunter50   29/10/10 11:41 PM
. * * Re: Proof... once again Mike_Bailey   30/10/10 12:51 AM
. * * Re: Proof... once again DarylS   30/10/10 01:35 AM
. * * Re: Proof... once again GroovyMike   30/10/10 02:10 AM
. * * Re: Proof... once again 450_366   30/10/10 03:04 AM
. * * Re: Proof... once again oupa   30/10/10 04:39 AM
. * * Re: Proof... once again tinker   26/12/10 06:48 AM
. * * Re: Proof... once again DarylS   30/10/10 06:35 AM
. * * Re: Proof... once again GroovyMike   30/10/10 07:10 AM
. * * Re: Proof... once again Brithunter   14/12/10 10:33 AM
. * * Re: Proof... once again DarylS   26/12/10 05:47 AM
. * * Re: Proof... once again oupa   25/12/10 03:12 PM
. * * Re: Proof... once again 4seventy   27/10/10 03:41 PM
. * * Re: Proof... once again kamilaroi   27/10/10 06:58 PM
. * * Re: Proof... once again oupa   28/10/10 03:26 AM
. * * Re: Proof... once again DarylS   28/10/10 03:57 AM
. * * Re: Proof... once again kuduae   28/10/10 06:13 AM
. * * Re: Proof... once again kuduae   28/10/10 06:49 AM
. * * Re: Proof... once again Huvius   28/10/10 07:36 AM
. * * Re: Proof... once again 4seventy   28/10/10 08:33 AM
. * * Re: Proof... once again kuduae   29/10/10 07:46 AM
. * * Re: Proof... once again 4seventy   29/10/10 08:26 AM
. * * Re: Proof... once again 4seventy   29/10/10 08:45 AM
. * * Re: Proof... once again DarylS   29/10/10 10:21 AM
. * * Re: Proof... once again kuduae   28/10/10 08:10 AM
. * * Re: Proof... once again 4seventy   28/10/10 12:58 PM
. * * Re: Proof... once again oupa   29/10/10 03:31 AM
. * * Re: Proof... once again kuduae   29/10/10 07:39 AM
. * * Re: Proof... once again DarylS   29/10/10 03:30 AM
. * * Re: Proof... once again kuduae   28/10/10 08:43 AM

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