Quote:
Originally Posted by Dave Suponski
Jerry, How can a load with 24.5 grains of SR 7625 equal 3700 psi?
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Dave,
It is just the properties and burn rate of SR 7625 I guess with so little shot. Dan Morgan who works on Damascus barrels told me about the load when I had some bad dents removed from a Damascus tube and I was down to .022 thickness at that spot. If you get the IMR load data book there are over a dozen loads with 24 grams of shot from 3000 psi up to the highest of 5400 psi for a humming along 1250 fps.
When I shoot 12 gauge AA hulls in my 10 gauges using Gauge Mates, regular loads ruin the hulls where the cases split in the little gap of the Gauge Mates. When I use the 24 gram 3500 psi loads, the hulls do not split in the Gauge Mates. Thus I can tell they are very low pressure. I can't copy the book at home but I am sure someone else has the IMR book. Do you have one by chance? Look at the Winchester AA loads.
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