Thread: suppressor pressure

Thanks Sneeze. I went back over everything while I was waiting for Hardy. He couldn't find any fault with the suppressor but sent me a new one anyway. Sorry it's taken so long to add to this thread but have only just had a chance to shoot the rifle. I rechecked my die setting and are around 2 thou shoulder bump. Plenty of neck tension, 3thou and very hard to pull so no movement there and verified with measuring. When I fired it with the 64gn load there was still pressure signs but not as bad. I went back to my trial loads and looked closer. The book stated 175gn bullet with 66gns should be about 2850fps. I was using different cases and a 175gn eldx which are known to have a long bearing surface and tougher jacket than the eldm. I was getting 2815 at 62gns and 2847 at 62.5 upto 2920 at 64. Since velocity is a result of pressure I decided I was at max with the brake and the suppressor may have had a slight back pressure and pushing it over the edge and causing problems. So i reduced back to 61.5 and went up to 62.5 which seemed ok and was still more speed than I had expected. It doesn't group as good yet so I intend to load some up and fire through both brake and then suppressor. The previous owner used 2217 at 64gns I think with out checking but said it was getting up there ( I did pull a couple and our scales seemed to be the same) If the accuracy doesn't improve I'll load some with that. Have manage to anneal the cases now so interesting to see what difference that makes. Wounder it the slightly faster powder will have a different affect on launching the bullet a bit quicker from the start? Also want to shoot prone so the bi pod spikes can dig in better than from the bench. Interestingly the bipod seems to come lose after a few shoots. I tighten it enough that I'm worried the front stud will pull out but still have to re tighten. So there's my conclusion , Being right on the max and just a small thing to make it to much. My 7rm ran 70.5gns of 2225 for 2850fp with the 180eldm. I was hoping the 7saum would do 2750 and be happy with anything more. I am surprised how strong the cases seem compared to others so maybe it doesn't show pressure signs till quite above where you would expect? Least I've got more excuses to do some more shooting