I have 2,500 170gr .40 bullets from Precision Bullets on hand. www.precisionbullets.com They're coated in some sort of "dry lube" polymer coating. Here's the deal. I need to work up a pretty hot .40 load to make major power factor for USPSA. Are these bullets safe in an OEM Glock 35 barrel or do I need to either get a KKM barrel or sell these bullets and use jacketed?