Baracuda Match is suposed to preform better than the JSB in a Gladiator at full speed cause the JSB does 295m/s (968ft/s) and the baracuda does 255m/s (839ft/s) wich brings it under the "magic" speed of 274m/s (900ft/s) were the bullet starts loosing accuracy.
The diameter of the both bullets are about the same so there should be little difference loading them. A pellet with a diameter of 5,50mm is pretty easly slamed in place by the "loading arm" while a 5,52mm needs some pushing. It was a veeery long time since i shot my rifle but i am pretty shure the accuracy of the JSB is not bad. I have shot many JSB (or the rebranded FX-pellet) at full speed but most of them was at 9 m at home, so i dont have much experience of that bullet at long range. I have done very pleasing groups with Baracuda Match at about 60 m. I was very happy.
I have shot 16gr then 21gr and back and forth, and i have never noticed any problem in doing that, neither have i ever heard that it could cause problems shooting a (relativly) heavy pellet out of a FX (or any other PCP/CO2).
I hope you enjoy your new rifle.
Fx Gladiator .22 - SIMALUX Gold Edition 6-24x50 AO (Med licens att döda) * Röhm Twinmaster Trainer .177 * Baikal IJ-53M .177
"I dont cook food, i kill it!" - PistolPete, 2008.