CAS TOPICS > The Powder Room - CAS reloading
44-40 Videos, Pressure Test Pressure Curves
Bryan Austin:
Over the past few years I conducted 83 ten shot tests using the PressureTrace II system. Recently I decided to try and open up a comparison chart using overlays in the Gimp editing software and make some videos out of them..
It is not the best but I think it is certainly good enough for discussions.
It took me a while to satisfy myself as to the accuracy, but with the discovery of a few missing links, in general, everything is 100% consistent with reloading manuals and factory ammunition.
Rather than do one video at a time, once or so a week, I decided to dump a few all at one time. Check the website link below for updates.
For CAS, I made some Black Powder, Trail Boss and Unique tests that have been published.
https://sites.google.com/view/44winchester/chasing-the-44-40/handloading-introduction/pressure-testing/pressure-trace-videos
Trailrider:
Fascinating! I do wish you would have shown one of the "standard" loads of 8.0 gr. Unique 200 gr hard cast bullet, as well as some of the loads using ReloadeR 7. The premature shotstart you mentioned could be the cause of destructive overloads if a bullet lodged in the forcing cone of a single-action revolver, where the powder isn't fully brought to stable burning pressures of 5,000- 7,000 psi.
Keep up the good work!
Bryan Austin:
--- Quote from: Trailrider on May 07, 2022, 12:41:27 PM ---Fascinating! I do wish you would have shown one of the "standard" loads of 8.0 gr. Unique 200 gr hard cast bullet, as well as some of the loads using ReloadeR 7. The premature shotstart you mentioned could be the cause of destructive overloads if a bullet lodged in the forcing cone of a single-action revolver, where the powder isn't fully brought to stable burning pressures of 5,000- 7,000 psi.
Keep up the good work!
--- End quote ---
Excellent information, thanks for stepping in.
The 7.9gr Unique load with the 427098 should be close enough. An important note is to observe bullet diameter, bore size and seating depth. oddball design bullets can be problemsome.
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cpt dan blodgett:
Sadly do not have the Accurate mold specified for 215 Grain bullets. I do have the better part of 1000 of desperado .428 205 grainers. Would your Reloader 7 and IMR 4198 loads from the custom loads section work with those bullets? I normally shoot Cowboy action with reasonably mild loads, but there could be some utility to having a 1300 FPS rifle load to shoot long range competition with targets at 80 and 100 yards routinely. I do have the Accurate 43-215 C mould that should drop a 205 to 210 grain bullet depending on alloy.
Professor Marvel:
thanks very much Bryan!
your work is greatly appreciated and I am grateful that you are sharing it!
Jack Christian would be proud!
yhs
prof marvel
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