Am I good to go loading 9mm with small rifle primers. I thinking of loading with Blur Dot which I havn't loaded with before?I have done this. but the pistol primed .223 rounds were not for use in a rifle. they were for use in a powerhead. (a slam fired device that attaches to a spear gun spear or pole spear for killing large fish & sharks under water) because the .223 power heads have such a small diameter barrel, (the part that strikes the fish and causes the slam fire) they would often not fire or stick in the fish when hit in a soft body part. to try to remedy this, I loaded up .223 ammo with the softer cupped pistol primers. it worked a little better but I went back to using .44 mag. & .357 mag powerheads as they are a lot more reliable.