Some people have reported issues with 230 gr Gold Dots in addition to the Hornady 230gr TAP. Recommend you take your barrel, and chamber check different kinds of ammo before making a big purchase if possible. Generally speaking, it is primarily 230 gr ammo that is having a problem. Winchester Ranger and Federal HST 230 gr usually both fit and function well in 45 caliber HK pistol barrels. . . they also seem to have pretty damn good terminal ballistics as well (for a handgun).
If you can, take out your barrel and drop a 230 gr Federal HST or Winchester Ranger round into your chamber. Press it in towards the muzzle and try to turn (spin) it with your finger tips on the case rim as you press it in toward the muzzle. If your chamber is clean, it should be finger-tip-turnable with only the case mouth resting against the chamber step. In other words, it should feel the same as if you do it with an empty fired cartridge case with no bullet in it. If the cartridge is too long, then the bullet ogive will be engaging the rifled bore, making the cartridge very difficult or impossible to spin with your fingers while pressing the cartridge in towards the muzzle. If you have really strong fingers, and you do manage to spin an overlong cartridge by easing off a little on how hard you press it towards the muzzle, the rfling of the bore will leave a telltale scratch-ring around the ogive of the bullet when you remove the cartridge and examine it.
If you can, take out your barrel and drop a 230 gr Federal HST or Winchester Ranger round into your chamber. Press it in towards the muzzle and try to turn (spin) it with your finger tips on the case rim as you press it in toward the muzzle. If your chamber is clean, it should be finger-tip-turnable with only the case mouth resting against the chamber step. In other words, it should feel the same as if you do it with an empty fired cartridge case with no bullet in it. If the cartridge is too long, then the bullet ogive will be engaging the rifled bore, making the cartridge very difficult or impossible to spin with your fingers while pressing the cartridge in towards the muzzle. If you have really strong fingers, and you do manage to spin an overlong cartridge by easing off a little on how hard you press it towards the muzzle, the rfling of the bore will leave a telltale scratch-ring around the ogive of the bullet when you remove the cartridge and examine it.