I bought a Bersa firestorm .22 earlier this year and took it out to a friend house to shoot. Took a new box of Federal bulk with me and could not go through a whole mag without FTE, just not enough oomph to cycle. He had some Remington thunderbolt shooting in his Mk II so i tried that , 100 % good to go. Since then I have shot 1000+ rounds of Remington GB without a hiccup, includinr range sessions in excess of 300 rounds without cleaning. And I still hit what I was aiming at, including the broad side of a barn. Haven't tried any Federal since the break- in even though I have some in storage. Ya'll send me all that dirty, inaccurate Remmington and I'll make sure it doesn't ruin any more of your range time.