My solution was to buy both I started with 177 from AOA, changed the hammer spring and get about 80 shots. from 3000 to 1200 psiThen last week found a .22 cal at mannofirearms.com for $235 to my door will be here tuesday and I have the spring ready to change it tooBoth guns can use marauder/avenger style mags and I also use the hi cap ones from aeswede.com 17shot .22 20shot .177Carm mags work well also.The 1357 Beeman is a lazer at 20 rards I can put 5 shots in one hole, hope the .22 is as good I also got a 2027 beeman pistol that is amazing and uses the same mags as the 1357