When I shot the Winchester primers I had misfires all the time. I was told they were not strong enough and that was my problem. So I purchased Remington STS and CCI 209 primers. I was shooting the CCI but wanted to try the Remington today. Well they are not going to be used.

I checked for a burr Semisane and could find nothing. No reason why that thing should grab a primer and not let it go.