Thanks to everyone, very helpful, had opportunity to shoot with someone knowledgable with this airgun a little windy but off to a great start, omitting slugs for now, tuned for 34gr heavies, then 25gr, pleased with results.
I was wondering very new to the fx impact, and was wondering if the 34gr pellet, and the 34gr slug would shoot equally at same tune, I'm shooting 25 cal.