I am the proud owner of a Gen1 Dreamline .22 tactical bottle version and would like to try the 21/23 gr slugs.I have been told that the Gen1 is only really good for shooting pellets because the valving is smaller than the Gen 2 .Just wondering if any of you Gen1 owners have any info to add with your experience.By the way I have the powder plumun installed and a 600mm barrel on order.Your comments please.