I've never had a Blazer round malfunction in my .357. I have had a squib (first time I've heard that term) with Winchester ammo, but it was my fault. I was playing around with lightening the trigger pull on my S&W 686 and part of that was to lighten up the hammer spring. I went too far and had a few misfires. They don't make it all the way into the barrel, they wedge into the forcing cone and then the cylinder won't turn. Haven't had any issues since I tightened the spring back up.