Used those bullets for years, great accuracy and devastating on deer. However my last batch of sabots are impossible to load also. Something changed, maybe sabot manufacturer or sabot thickness. Didn't try to figure it out, just went to crush rib sabots and nosler 240 hollow-points. Accuracy is still there, don't know how they will perform on deer. Will find out Dec. 7 when our muzzleloading season starts. Good Luck