Does anyone worry about the type of 209 primer used in shotshell TARGET loads???Well, shotshell target loads may run just as high for pressures as Magnum turkey loads. Something to consider. Target loads use faster powders that can spike with minor changes. Primers are not really universal as loads are responsive to hull design, wad design and materials, etc. I use W209's for everything, but there is not necessarily a load for W209 primers. For those I stay at the low end of the spectrum, and live with the reduced velocity. Rarely had a problem with pressure on the high end, but it can happen. If loads won't cycle an auto, I know they are at the low end and bump them up. If I get an extraction problem, I suspect high pressures and drop a grain. All of my shotguns are 870's, which are probably one of the most durable designs. I wouldn't use the same practice on a Spanish made double that was forty years old.
It depends, but even established recipes followed to the letter have caused me a couple problems over time. HS loads with Red Dot and 1 1/8oz shot loads come to mind. The reason being that smallest shot sizes often come in a bit over.
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