only real way tell what silences best is go try a few, unfortunate, but there yu go.
if your wandering if a silencer is at all worth it, especialy on a pcp (not so much on a few springers lol), then..
lets take rats.
day one unsileced yu nail a load
by day five or 6 you get a few..lesening.
give it two week of 3-6 days a week..one shot the lot are gone
and you say ooo cleared them.(same thing on lamps..white bright to dwindly colours and all in between).
silenced, (like whispa silenced)
day one same, nailed loads.
day 14 still nailing loads off and on, but by less numbers. ba