To me, Tight Choke has always felt like something of a double-edged sword since while being able to fight scrakes at a longer distance is welcome for the Support perk, I can't help but think that the trash clearing power of shotguns actually come from a wider accuracy spread. I think to make the penetration perk more attractive, it'll probably be worth it to give a slight damage boost so as to improve the total damage of point-blank shots to account for the fact that large zed takedowns would be much less safe without the Tight Choke perk skill