Jim Watson said:200 yards is a long shot for a .22 but as Chuck likely knows, that is the range chosen for BPCR smallbore silhouette because the shots are about as difficult as with a .45-70 at 500 metres.
wanderinwalker said:I find with a Walther KK100 shooting your standard target-grade ammo, 100 yards is about the maximum range. Those tiny little 50-yard clusters get noticeably larger at 100 yards. Not just 2x the size; more like 3x the size for me! :banghead: And that is using iron sights.
The transonic boundary is the distance where the bullet slows to below the speed of sound. When this happens the sonic boom following the bullet catches up and blasts past it. The effect is somewhat similar a jet flyover blowing your hair back. As a result the bullet get's tossed about a little causing less than great accuracy. For this reason, Aguila makes a sub sonic sniper round that starts off slower than sound (no sonic boom follows it) but it uses a fairly heavy bullet to retain energy which allows it to reach farther. I have been able to make a first try shot at 350yds using this ammo in a 5in Browning buckmark. I can usually empty all nine shots out of my Hi Standard revolver into the 340yd target. Bear in mind that I'm simply trying to hit a standing hunk of aluminum that measures a good 18" by 36". The pig, chicken and ram targets mentioned above are considerably smaller and make much harder targets even at closer ranges.MachIVshooter said:I have heard from several gunsmiths that it is virtualy impossible to get .22 LR to hold sub-MOA at 100 yards. The explanation (as given to me) is that there is some phenomenon that occurs when these bullets transcend from supersonic to subsonic. I have never really researched it, but I trust these 'smiths, as they have been building precision guns for many years.