Paul primers are a press fit. Successfully inserting a part pressed fit into another will vary according to parts size, how much pressure is applied and the material itself. Plastic will allow a larger variance in size than other materials . It’s my guess differences in result we see is due to the amount of pressure applied when seating the primer. Probably differences in the plastic itself and different guns have different high primer tolarance . Likely smaller the gauge more it shows.
I agree with you, tapered reamer may not be the best tool,considering how much needs to be removed. I plan to measure my reamer and see what the size differences are. Point of contact vs reamed. Easy to use a drill to do the same thing. Would take a very small cylindrical reamer but they are available. None in my toolbox.
None of this needed if I had not bought a 2nd 20 G Trojan or been able to match STS hulls with Remington primers. Rain the last few days time to experiment too.
William
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Threaded Mode