Aguila 22 sub sonic ammo

I was at the local gun shop last nite & over heard a conversation about repairs being done.
it seems they had a few 22 rifles come in that would not hit anything. the common denominator was the low power Aguila 22 sub sonic ammo.

the one gun had 5 rounds stuck in the barrel 3 " from the muzzle. another gun had 3 rounds stuck about 2" from the muzzle.
because these rounds are soft lead they were able to drive the rounds out of the barrel.
they also tested a brand new box of this ammo & the rounds stuck again :icon_rolleyes_zps90