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Shooting & Reloading - Mausers, Big Bores and others >> Muzzleloaders & Blackpowder
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Dphariss
.300 member


Reged: 18/04/06
Posts: 130
Loc: Montana
Re: H777 corrosive byproducts
      15/11/09 12:50 AM

In *independent* testing P-dex is worst, T-7 second, BP third in corrosivness. T-7 is about 1/2 way between p-dex and T-7. I think T-7 is about 20-30% perchlorate. Its a revised P-dex which has far more perchlorate. T-7 is covered by the P-dex patent if I am properly informed.
I am also told that the perchlorate fouling will rust under an oil film.
If these perchlorate powders are used in old guns with existing pits its very difficult to get the rusting stopped. Not matter how much water you use.

The P-dex/ t-7 residue is highly corrosive and even a 1/2 grain or less in a primer (Potassium Chlorate in primers) will eat bores as a frightening rate.
BP is basically non-corrosive at less than 30% Relative Humidity.

I can only speak to what I have seen, experienced and had reported to me over the years. I either shoot BP or smokeless. I avoid the synthetics.
I am alarmed that Hodgdon now controls not only Pyrodex etc but also Goex. The profit margin for Goex's sporting BP line is not all that high I am told....


Dan

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Entire topic
Subject Posted by Posted on
* H777 corrosive byproducts Tatume 05/11/09 03:05 AM
. * * Re: H777 corrosive byproducts Dphariss   15/11/09 12:50 AM
. * * Re: H777 corrosive byproducts tinker   15/11/09 02:13 AM
. * * Re: H777 corrosive byproducts Dphariss   16/11/09 02:55 AM
. * * Re: H777 corrosive byproducts tinker   16/11/09 03:27 AM
. * * Re: H777 corrosive byproducts PBR   21/11/09 05:01 AM
. * * Re: H777 corrosive byproducts Dphariss   22/11/09 12:31 PM
. * * Re: H777 corrosive byproducts PBR   24/11/09 03:56 AM
. * * Re: H777 corrosive byproducts DarylSModerator   25/11/09 12:58 AM
. * * Re: H777 corrosive byproducts DarylSModerator   03/01/10 09:45 AM
. * * Re: H777 corrosive byproducts tinker   03/01/10 11:39 AM
. * * Re: H777 corrosive byproducts DoubleD   03/01/10 12:05 PM
. * * Re: H777 corrosive byproducts DoubleD   03/01/10 12:13 PM
. * * Re: H777 corrosive byproducts Tatume   21/11/09 08:46 AM
. * * Re: H777 corrosive byproducts DarylSModerator   05/11/09 03:21 AM
. * * Re: H777 corrosive byproducts Tatume   05/11/09 03:38 AM
. * * Re: H777 corrosive byproducts DoubleD   05/11/09 05:27 AM
. * * Re: H777 corrosive byproducts DarylSModerator   05/11/09 05:49 PM
. * * Re: H777 corrosive byproducts DoubleD   06/11/09 12:49 PM
. * * Re: H777 corrosive byproducts DarylSModerator   06/11/09 01:44 PM
. * * Re: H777 corrosive byproducts BillfromOregon   09/11/09 02:54 AM

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