Carbineone1964, you have asked a very simple, yet deceptively sophisticated question. It's simple; How much powder reduction when using lead instead of steel?, and most folks think, who cares? The sophistication reveals itself when you consider the question: WHY? Everyone knows the weight is in the range of 1/3 more for lead. So? Well, you have to go beyond the obvious and ask: We know the cause (the switch), but what is the effect? More recoil, right? Yes, so the amount of reduction in powder charge weight is directly opposed to the measured increase in recoil due to the increase in shot weight.
That's why smart, experienced people in this hobby will advise you to start with low powder charges and work up to a load which gives a reasonable amount of recoil. When Mike and I reach this point, we keep the same shot and back off on the powder slightly as we search for the most accurate load, because, as most of you know, famed hunter, rifleman and writer Col. Townsend Whelen wrote that, "Only accurate rifles are interesting." We believe the same is true of most cannons. Firecracker guns and salute cannons are the exceptions, of course. Our unwritten Motto is: We will embrace any excuse to experiment!! Carbineone1964, you are in the enviable position to do the same.
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