i did a nontoxic pressure test to basically buy one powder and wad-hull and swap the shot out.
overall the test gave up some useful information. one being the powder. i suppose its not too silly to chat about powder or the overall package of a shell.
i reloaded lead, steel, bismuth,niceshot,copper**** hw13 / powershot and itx10. the individual shells say very little and compressing the dataset in statistics really do it justice.
i would whole heartedly replace any lead shell with the same volume of bismuth. thats calculated using 0.888 as a difference. take a 42g lead load, take out the lead and add about 37g of bismuth. when i did this in my test that was 36 lead load and 32g bismuth. the actual pressure dropped. hardly groundbreaking but its what i did. infact as the wad i used had to be steel rated when replacing the same volume ie 36g lead vs 25g steel, 28g coppershot, 32g bismuth,32g niceshot, all the pressures were lower than the aforementioned 36g lead.
now i did load 42g powershot aswell but it failed on statistics. that was hard luck.
now i suppose you guys are wondering what am i on about? well i can shoot nearly all nontoxics with one reloading dataset. except for the aforementioned 42g powershot load that failed.
there is nothing stopping me now loading up 36g of powershot with a bit of packing lifting the shot. ie 20gauge hard card at the bottom of the wad.
i can even load up a total amount of 36g of powershot / steel shot (in a special ratio, maybe steel 7s to act as a retrospective filler / buffer). this was the most interesting concept of using steel shot as a buffer to fill the volume so the load would be something like 30g powershot with steel shot on top. i`d have to do the calculation though....
am i off my rocker for thinking like this? i did all this with a mediocre powder ie vectan A1, because we are always told to use 381, alliant steel, sp2 bm50 powder or c4.
1300fps powershot is a viable goose shell. the rest were designed for ducking.