Thread: Why do .22s have such different accuracy with different ammunition?

Originally Posted by Ultimitsu

My theory is that this phenomenon may have a lot to do with barrel harmonics. Different animal have different amount of powder shoots at different speed and generate different harmonics. For different barrels, they may each have a particular frequency of harmonics that gives the best result.

Another possible cause is the variation in different ammos dimensions. Barrels are of different throat and muzzle thicknesses, So do ammos thickness. I remember out of all the ammos I have shot the cci subsonic hollow point is the fattest. SK magazine is possibly the thinnest. You could imagine a loose barrel with a thin bullet would not work out well. Vice versa if the barrel is too tight and the ammo is too fat it may cause too much and uneven velocity loss.

Hmmm but if it's barrel harmonics why don't I see more barrel weight tuners on .22 rifles?
If you are correct and barrel harmonics play a large part, then I'm going to play around with weights on my Lithgow barrel because Fiocchi subsonic are bloody hard to find at the moment.

As for ammo dimensions....can't do much about that...