Thread: suppressor pressure

24 inch proof barrel. I haven't used new brass yet. Shot count was a bit over two hundred by the previous owner so about 300 now. My loads are slightly less than his as I changed from 2217 to 2225 and reduced the charge. I did try 2217 and had stamping so went to the slightly slower powder. I pulled a couple of his loads to check against my scales before starting. Neck tension seems tight as bullets are very hard to pull. Measuring sized cases looks like 3-4 thou bullet grip. We have had a no go gauge in the chamber and the bolt closed so that explains the difference between new and fired cases. I was measuring the head space not overall length. I trim to 5 thou less than max, perhaps I should go the full 10thou?
As an up date I fired the rifle yesterday with the left over 62gn loads and it did the same. These were fine previously. I fired some 64gn loads and they were fine. The loads are compressed but I wouldn't have thought not overly. But I am wondering if the cases after being loaded are pushing the shoulder forward slightly or changing in some other way? Spinging back after sizing? When I get a chance I'll do some more measuring before ' during and after loading but this will be a couple of weeks away. I check weigh each load on another set of scales and measure each to ogive. My jump is about the same as the previous owners specs he supplied and documented. Would like to anneal but need to make a new bowl to fit the short cases first