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Post by Deleted on Nov 29, 2015 22:52:21 GMT -5
Richard...
A few years ago when testing some Duplex loads and even Triplex loads if I remember, you also tested some mixed powder loads (mixed the booster powder with the primary powder). I think I remember that you found when mixing the powders the velocities would drop somewhat but still retain the accuracy. Do you have anything that you remember and would like to share...I thinking of the possibity of mixing the powder loads for quicker follow-up shots if needed... Do you think Clays and 4198 would perform the same (obturation and such) as the regular duplex's when mixed...Just thinking....any thought?...
Zen
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Post by Richard on Nov 30, 2015 11:54:38 GMT -5
Zen...........in all cases, whether mixed or loaded backwards they both seemed to lose approximately 100 fps. As I recall, the accuracy did not overly deteriorate. No, I do not think you would get the same results as far as bullet obturation. The whole purpose of the duplex is two fold: One, to insure positive ignition and Two..........to get the bullet started so quick that the butt end wants to meet the front end....................which is what we call "fattening up the bullet or its obturation!"
In the event you mistakenly loaded your powders backwards or mixed them, I have not seen any evidence that it is in any way dangerous. Even a followup shot would probably hit your target provided it was not across one of them "bean fields!"
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Post by Dave W on Nov 30, 2015 12:23:40 GMT -5
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Post by Deleted on Nov 30, 2015 19:16:37 GMT -5
I remember seeing that ....the pressure trace thread is interesting....shows the regular Duplex and the mixed loads are identical...pressure and peak..... I guess I'll have to do some shooting this winter and see if the mixed loads fire off the TEZ's in sub zero temps as well as the regular loads..
Zen
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Post by Richard on Nov 30, 2015 21:51:50 GMT -5
Hopefully if the rain is not bad tomorrow I will shoot some mixed and backwards 10/60 loads and post the results.
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Post by Deleted on Dec 1, 2015 0:03:12 GMT -5
Hopefully if the rain is not bad tomorrow I will shoot some mixed and backwards 10/60 loads and post the results. Looking to see your results...shoot some TEZ's if possible Thanks, Zen |
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Post by edge on Dec 1, 2015 4:10:56 GMT -5
IMO, if you would not expect a 10/60 duplex to be exactly the same as 20/50 then don't expect a reverse duplex or a mixed duplex to be identical either...think of them as different because they are  IMO, I see no difference whether you change bullets or sabots or how hard a bullet loads you work up that load as a stand alone "Load", and how you build your duplex should be the same. If you lose velocity by mixing and you are not concerned about pressure then add a garin or two to the load, forget the original ratio and build the duplex from scratch. edge. |
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Post by Dave W on Dec 1, 2015 8:24:20 GMT -5
I thought maybe the fast boosters might perform better than the boosters like 4759 in a mixed duplex since we use less of it to achieve an efficient burn, still have the charges in the vials sitting on my bench. Just never got around to it.
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Post by Richard on Dec 1, 2015 16:15:14 GMT -5
When I can get it on paper, some interesting results today!
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