Head Aches
Oct 6, 2010 6:51:56 GMT -5
Post by rbinar on Oct 6, 2010 6:51:56 GMT -5
8-)I don't know where to start. I guess the word alone will be cast on my gravestone "Duplex".
To this day it's a wonder why it was ever mentioned. Like many thoughts it's a copy one could say it was plagiarized. While reading the Lyman reloading manual for black powder cartridges one could not help but see that many recommended loads were two powders. All of them were Imr SR-4759 and some black powder propellant. The catcher to me was the rifles and calibers mentioned were considered to be the lowest pressure tolerant cases made, all with designs out of the nineteenth century.
At the time there was a need! That need was shooting an extraordinarily light bullet from a massive 50 caliber bore. To this day the need should dictate the use.
With the advent of 45 caliber the need lessened. I fact a prime reason for smaller calibers was to increase the usable number of SINGLE powders. In 45 caliber there are numerous single powders that work well all alone. When 45 caliber loads were first explored two paths were followed. Steve White went the duplex pat I went to singles.
Since Steve is a fine gentleman and knowledgeable shooter it would have been (and still is) wrong for me to presume the path is wrong. For a fact both Steve and I were friends because we both were attacked for dare having an idea that was not politically correct to the shooting world.
Despite the fact duplex is a good answer to some smokeless shooting problems, ALL is not good in paradise. If it were to fall my way to correct this then it resides in a woefully inadequate hands.
All I can do is offer some common sense considerations. Those follow with no comment on how to apply, for fear that I should become the tyrant that was fought so hard against in the first place.
1 Before developing or even considering a load have a good idea of what pressure might be developed.
2 While developing loads have a guide as to what pressures are wanted for a given weight of powder. Do not exceed your own self imposed pressure limits.
3 If you wish to share the load, be prepared to give the supposed user the pressure they are likely to encounter. Always tell any possible user to start low no matter your experience with a load: he may not have that experience.
4 Note any special circumstances, like if you have ever shot the load in warm or hot weather, if it may be cold sensitive.
5 Seek to have at least some MEASURED data. Calculations are greatand were used to a great extent getting started but they need empirical backing as well.
6 Perhaps the most important guide: consider if the goal can be reached in a simple manner: many rush to duplex in 45 for speed, but a great deal of speed can be had by simply shooting a slower single powder.
Carry on and have fun. You really don't need my guidance here any more. But if an old man can have a last word let it be this:
THINK
To this day it's a wonder why it was ever mentioned. Like many thoughts it's a copy one could say it was plagiarized. While reading the Lyman reloading manual for black powder cartridges one could not help but see that many recommended loads were two powders. All of them were Imr SR-4759 and some black powder propellant. The catcher to me was the rifles and calibers mentioned were considered to be the lowest pressure tolerant cases made, all with designs out of the nineteenth century.
At the time there was a need! That need was shooting an extraordinarily light bullet from a massive 50 caliber bore. To this day the need should dictate the use.
With the advent of 45 caliber the need lessened. I fact a prime reason for smaller calibers was to increase the usable number of SINGLE powders. In 45 caliber there are numerous single powders that work well all alone. When 45 caliber loads were first explored two paths were followed. Steve White went the duplex pat I went to singles.
Since Steve is a fine gentleman and knowledgeable shooter it would have been (and still is) wrong for me to presume the path is wrong. For a fact both Steve and I were friends because we both were attacked for dare having an idea that was not politically correct to the shooting world.
Despite the fact duplex is a good answer to some smokeless shooting problems, ALL is not good in paradise. If it were to fall my way to correct this then it resides in a woefully inadequate hands.
All I can do is offer some common sense considerations. Those follow with no comment on how to apply, for fear that I should become the tyrant that was fought so hard against in the first place.
1 Before developing or even considering a load have a good idea of what pressure might be developed.
2 While developing loads have a guide as to what pressures are wanted for a given weight of powder. Do not exceed your own self imposed pressure limits.
3 If you wish to share the load, be prepared to give the supposed user the pressure they are likely to encounter. Always tell any possible user to start low no matter your experience with a load: he may not have that experience.
4 Note any special circumstances, like if you have ever shot the load in warm or hot weather, if it may be cold sensitive.
5 Seek to have at least some MEASURED data. Calculations are greatand were used to a great extent getting started but they need empirical backing as well.
6 Perhaps the most important guide: consider if the goal can be reached in a simple manner: many rush to duplex in 45 for speed, but a great deal of speed can be had by simply shooting a slower single powder.
Carry on and have fun. You really don't need my guidance here any more. But if an old man can have a last word let it be this:
THINK