Actually, its pretty common for people to loose accuracy with the more powerful 209's. It can actually push your load slightly up before setting it off. Its also not uncommon for me to find a particular primer or cap a load likes to the best. So I am not too surprised.

The cap went off just didn't ignight the powder. I should have took the nipple off and thrown it in the ultrasonic cleaner. But here I am with the 209's. I usually only shoot my disc or my T/C sidelock these days.