I've read that subsonic rounds are inherently more accurate than supersonic rounds, on the basis that they do not breach and re-enter the sound barrier, causing
Does this hold any validity?
I recently went out and purchased some .22 cal 780fps (iirc) CCI CB ammo to try and test this theory. While I was able to dime-hole (er, a bit smaller, actually) the targets I was shooting at 25 yards with Remington Game Load and CCI Mini Mag, I spent the better parts of an hour and 100 rounds of the CCI CBs missing the 4"x4" paper targets I was using. At first I thought it was a pressure charge issue, with the bullets simply not having the same trajectory (it took me a while to figure out precisely where the bullets were going, unfortunately). That proved to be un-true, and the bullets were simply impacting in a much larger radius (about 8" @ 25yds).
I went back to shooting 'bulk' and the CCI ammo afterwards to verify that it wasn't the gun. I was still able to shoot the brass 'tops' off shotgun hulls at 50 yards, and the paper targets looked the same.
So what's the scoop here? I'm shooting with a CZ 452, by no means a 'crap rifle'. Could it be a rifling twist issue? Or my rifle simply not 'liking' the CCI CB Short ammo? Or something to do with the rate of twist? I find it hard to believe there'd be that much inherent inaccuracy in a commercially loaded round.
If it is in fact that the CB Shorts are just bad/inaccurate, are there any other subsonic rounds I might be able to try which have shown to be accurate, in your experience?
Does this hold any validity?
I recently went out and purchased some .22 cal 780fps (iirc) CCI CB ammo to try and test this theory. While I was able to dime-hole (er, a bit smaller, actually) the targets I was shooting at 25 yards with Remington Game Load and CCI Mini Mag, I spent the better parts of an hour and 100 rounds of the CCI CBs missing the 4"x4" paper targets I was using. At first I thought it was a pressure charge issue, with the bullets simply not having the same trajectory (it took me a while to figure out precisely where the bullets were going, unfortunately). That proved to be un-true, and the bullets were simply impacting in a much larger radius (about 8" @ 25yds).
I went back to shooting 'bulk' and the CCI ammo afterwards to verify that it wasn't the gun. I was still able to shoot the brass 'tops' off shotgun hulls at 50 yards, and the paper targets looked the same.
So what's the scoop here? I'm shooting with a CZ 452, by no means a 'crap rifle'. Could it be a rifling twist issue? Or my rifle simply not 'liking' the CCI CB Short ammo? Or something to do with the rate of twist? I find it hard to believe there'd be that much inherent inaccuracy in a commercially loaded round.
If it is in fact that the CB Shorts are just bad/inaccurate, are there any other subsonic rounds I might be able to try which have shown to be accurate, in your experience?