Medium powders with medium speeds are the name of the game with semi-autos.
For the .06, 4895, 4064, Win 748 are good basic choices - stay away from the slowest and fastest powders recommended for the caliber and keep the speeds 100 to 200fps below max.
Do this, and your operating system will thank you and the gun will reward you with great shooting.
BTW, the gas system DOES need cleaning from time to time too.......every 300rds is a good gauge to go by.
Oh also, for Semi handloading................... make sure to full-length resize your cases and set the primers slightly below the case head - this will make sure you have no issues with your rounds feeding and being safe.