The .243 is a good cartridge for PRS matches. I started using one in 2004 and still have one as an option but as mentioned I load my ammo. You will want a 105+ weight bullet. The 6mm Creedmoor has taken the 6mm top cartridge over the past few years but the .243 will still do the job as it will send the bullets out as fast an accurately as the other 6mms. Most matches limit to 3100-3150fps anyways. Factory .243 ammo is lacking though. If you want a factory round then go with the 6.5 Creedmoor.