Dpm recoil reducing guide rod and spring - DPM Beretta PX4 Storm F/G/C/D Full Size Mechanical Recoil Reduction System

All said I used probably every weight and design ammo through my 45 PX4 with the DPM recoil reducing stainless steel spring and guide rod all ammunitions ejected well and fed well with exception to Winchester silver tip hollow point one time out of 20 seems to have a short delay in chambering around I blame that on the Winchester silver tip hollow point which has a very aggressive sharp tip I can't say I recommend using this ammo it's kind of like a sawzall blade going up your feed ramp it did after all chamber after about a quarter of a second delay I was firing and quick succession looking for any discrepancies that's the only delay there was and again I blame that on the aggressiveness of the tip of the ammunition and the PX4 has a very short feed ramp and it does load the rounds pretty much straight in but I'm still not real pleased with the ammunition I am however pleased with the DPM recoil reducing stainless steel spring and guide rod