06-20-2013, 04:03 AM
I have had my grendel a short time and fired about 200 rounds through it. I have yet to achieve a consistant group at 100yds. I've tried different powders and loads and the results are all similar, no tight groups, inch or better, and fliers. While cleaning the barrel after the last shoot I noticed two things: a couple of very small flecks of copper on the patch and when the jag went past the gas port there was a definite rough spot. You can feel the patch/jag pass over the gas port hole. Is this normal?