The 240 Grain jacketed soft point and hollow point are the only factory loads available when the Ruger Deerfield first hit the market! In other words, that is what the gun was originally intended to shoot!
Your problem with them not cycling through the action is probably due to the gas port being dirty, possibly plugged!
As far as WalMart ammo goes; The ammo companies still have to maintain certain standards, regardless of who they sell their ammo to!