My go-to duck load during the 'lead years' consisted of 1-3/8 oz of high antimony #5 shot and whatever Winchester listed as their max charge of W571. I used it in AA or Peters blue 2-3/4 cases. I believe claimed muzzle velocity was supposed to be 1330 fps. If you fired enough of those you would get a nose bleed, but they really worked. I had no problems with temperature and I did a lot of shooting when it was well below 32 deg. So today I use 1-3/8 of bismuth or tungsten polymer, which seem to work quite well. Also in my old age I have found that if I slow down the muzzle velocity a bit pattern percentages go up.
C.G.B.
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