Hello i'm kinda new here, and i dont know much about air guns, i got my first gun for christmas it was a benjamin super streak! right out of the box it looked great. very..VERY heavy, i shoot crosman premier hollow points and after the break in shots, can get 1" groups at 50yards!!! The only thing i didn't like about it is that i had to remount the scope to get it to zero. but other than that, it was great. better than daisy pump master's. I tried gamo PBA pellets and was able to get 3" groups at 50yards, and have gotten a 75yard kill on a bird. countless 50 yard kill shots on squirrels, and even a 20 yard rabbit kill. The super streak is very accurate and hits hard even with 7.9g hallow points. However it losses its energy quickly and could not even crack glass at 100yards, but i was able to hit a coke can at 100yards. I've noticed that crosman sells replacement parts for the super streak, including the .22 size. My question is: can i order the .22 barrel from crosman and drill out the compression tube to .22 size and convert it to .22 but still be able to use .177 with a simple barrel change? I figure that if i can drill the compression tube to .22 but without drilling bigger than the seal, i can still use the .177 barrel. Is this possible?