So the lead ban for 12g & 10g was in place for several years prior to these studies in the 90's so that they show the significance of lead shot from sub gauges? Then post up these study details please, along with the even earlier study details from before the big gauge bans were brought in, as requested above. If this is not the case then research IS required. You simply cannot say that lead from these sub gauges is a significant issue unless you actually investigate it. If the only research you have is summarised in your earlier post then the expected significance would be 4% of 7.5% = 0.3% by YOUR numbers. You guys are the ones enforcing the changes, please feel free to demonstrate to those you serve that there is a significant issue here. Hell these sub gauge guys have some nerve picking on the 0.3% of breeding birds in the population!
An analogy for you. Would you accept a speeding ticket for being 5km/h over the speed limit from someone who was standing on a street corner without a means of determining your speed? I'd very much doubt it.
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