I have been loading some 9mm loads using Lee 124gr. TL boolits, lubed with LLA/JPW mix and unsized. Load is WW231 4.4 gr. and these are seated to the first microband. My problem is while they function fine in the gun (SA XDm 5") before I shoot a hundred rounds the barrel is leading like crazy (mostly toward the muzzle end) and the accuracy goes away. Looking at the target shows some seriously unstable rounds with keyholes and a pattern rather than a group. I have tried seating the bullets out to a OAL of 1.165" but that didn't help. Less powder, different powder, different lube, longer/shorter OAL, other suggestions? Thanks for any input!