Not a chance. These fired perfect through my revolvers.Any chance the bullets are under sized or the brass is not holding the bullet tight, I had a problem with some cast loads in the mosin. Many rounds of the same load with out issues. Then I started getting odd squibs and bullets falling short of the target. I found my lock ring loose and the die must have adjusted down and appeared to be squishing the brass and bullet and the bullet was getting sized down.
I also had a issue with 30-06 cast loads. I forgot I used a different alloy in the pot and the 30 cal bullet I was casting was coming in under what I thought.with the old alloy they dropped right at .310” with the “other” alloy they where actually dropping just under 308”
What happened with those was a loss in velocity and really messed with my dope.