I have tried a different source and had really bad pip. I will try it again to make sure. I just did 100 for a test to see. Always do small shots on the first time pinning with new gear just to make sure it all good. Love the Test C but will try pinning again to make sure. But it might be I just cant do Primo which would suck because I would like to do a good run on it.Try a different carrier oil? And if it’s your first time using primo ya might just have to get used it it and the pip might go away. Could be worth a try