If your bullets don't make it to the target.....either you've got a barrel that's been rifled with a turning plow, your twist is too fast, or you're using bullets with thin jackets....or...you're trying to push them at the speed of nanosecond!!
I just read this thread for the 1st time. As to the Aguila 60 gr. .22 rimfire cartridges and what they will shoot well out of, I had my gunsmith get a 1:8 barrel liner and had him line the barrel of a Remington 521T rifle and a H&R Sportsman revolver. It seemed to do the trick.
