Sidewinder Cylinder Binding

[camper]

Took the new Sidewinder to the range and put around 90-100 rounds through her this morning.  Started with the LR cylinder and put around 35 rounds down range and then switched to the magnum cylinder.  After about 40 various rounds, the cylinder started to bind after the first or second round fired. After the third cylinder reload and the cylinder still binding, I pulled it apart and oiled/wiped it down.  Then tried the LR cylinder and it worked fine.  Changed to mag cylinder and wiped down and tried again and had no problems with a full five round cylinder.   Just finished a top to bottom cleaning and light oiling and reloaded with Hornady 45gr PDA ammo.  Rotated the loaded cylinder numerous and there is no sign of any cylinder friction.  Have come to the conclusion that there was some fouling buildup in the cylinder which caused the rounds to not fully seat and after the first round fired they backed out a bit and caused the cylinder to bind.  Have two other Minis, the Pug and 1 5/8 Mini Mag combo and have never had that happen before.  Of course, never put this many rounds through either of the others in one range outing.  Will take it out again this coming Wednesday and put a couple cylinder loads though to see of there is still a problem.  I think the cleaning took care of it.