Do air rifle silencers affect accuracy?

Testing a few of my air rifle moderators down range to see which is most effective and holds the tightest groups at range i'm testing the older Bsa vc, the Weihrauch hw100 and the Airmaks modular silencer from my Katran. we look at group size in pretty tricky wind at 45yds i also have a little shoot on my biathlon targets the rifle is an Anschutz 9015 the scope is a prs specific discover ed 5-25x56