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#240871 08/25/11 08:27 AM
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Sidelock
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I cannot seem to find either the dram equivalent or any type of chamber pressure reading on these new non-toxic shells. Does anyone know or have tested or had tested the chamber pressure in Kent’s Tungsten Matrix of the new Hevi-Shot classic doubles shells?

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I get the impression from the advertising (not a particularly good source) that the Classic Doubles Hevi-shot may be low pressure, but that the Kent T/M and all the rest of the Heavy-shot offerings are pure Saami spec. loadings not suitable for our old guns...Geo

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Geo. I think you're right on that but even with a dram equivalent I can get some idea of where the pressure is or at least a range of pressure. But all it said on the box of Kent's Tungsten Matrix is 'MAX'. Anyone call Kent to see where their chamber pressure is? Granted I know dram equivalent is not the best way to do it but with that number and the weight of the shot charge I can at least back into a range of chamber pressures using a reloading manual...or can I??? confused

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I just buy Bismuth sporting loads when I can find'em; and I think they're probably high pressure as well. But I don't shoot them in my damascus guns or in any of my pre-1930s guns...Geo

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Which of your guns do you shot them in?

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Post 1926 Foxes, Parker, Ithaca NIDs etc. Nothing magic about the date; just figure that by 1930, all the US makers had adapted their products to the Super-X type shells by then. As far as the damascus barreled guns go I guess I'm just careful...Geo

I expect that the RST nice-shot loads are ok, but I've not tried them; still saving up to invest in a box.

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Kent Impact Waterfowl 1 1/4oz 9900 psi, 3/8oz 11,400 psi, and my pure poison 20ga load for anything flying: three-inch 1 1/8oz, 10,100.

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King B what guns do you shoot those shells out of?

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I shoot Kent 12ga 1 1/4 out of 1911 VH Parker, 1938 LC Specialty, 1913 Army and Navy, and 20ga SKB o/u Model 500.

I bismuth-handload half my duck-and-geese shells, and use 7,000-range with 12ga 1925 Sterlingworth and 1899 Francotte for sentimental reasons.

I'm no poster boy of risk assessment and believe I have reasonable instincts for safety. I honestly think good old guns will handle most anything.

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Dram Equivelent has never been an indicator for "Max" pressure, only the velocity of the load. Several factors in addition to shot wt & velocity, play important roles in "Max" pressure.
If you fire a given shot wt to a given velocity then the same work has been performed, but the pressure curves can be entirely different, thus a totally different max pressure. The Max pressure is just one small point of that curve. What you gain at one point, you lose elsewhere.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra
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