Guys:Fellers, Gary has been around the turnip patch more than one time and didn't fall off the trailer. You sure won't see me at a match with CCI or Remington RF ammo. You know what? I have shot those and know how they shoot in my rifle.
If the OP had asked for advice on ammo for a quality rifle, I probably wouldn't have posted. I would have just liked previous posts. I feed my rifles top(ish) end ammo, and can definitely 'shoot the difference.
But handguns are different.
The all time best score in the NRA 2700 bullseye match was shot years ago by an AMU shooter (using open sights, still not beaten even though optics are now allowed) who had his choice of several .45s (for 2/3 of the match). He stated later that he always picked the one with the best feeling trigger, not the best grouping. The gun he shot the record score with grouped just over 1 inch @ 50yrds. Chasing .1, or .01 inches of improvement just doesn't lead to better scores.
But let's focus enough on the actual gun referenced by the OP, and reiterate that you should never shoot high velocity ammo in a High Standard target pistol.
Dave