About 25 years ago I was in the rifle bay at my usual indoor range when a couple came in with their brand spanking new .308 Rem 700 and box of handloads. First round was a very mild "pop". They looked confused so I told them to open the action and take a look. No yellow "sand" spilling about, just a bit of a sooty case. Checked the bore. Yep, plugged. They took it out front and got it knocked out.
They came back in and tried again. Same result. I asked what load they had used. 150gr something or other with 43gr. of IMR4895. That should have worked fine. I asked if they were sure about the powder charge. Guy said yes, he watched his wife count out "the grains" and then count them a second time to be sure. Ah, I think I see the problem.
Auggie D.
Hahaha!! That would be a tedious process.