crimsoncomet
Member
Here I am again asking sizing questions. Thanks to all who helped me set my FL sizing dies up to bump the shoulders on the bolt action brass .001" to .002". Now I am on to sizing 6.5 grendel brass. I have about 200 pieces of Lapua brass thats needs to be sized and trimmed. I am using a redding type S FL die with no expander.
First off, I will say that I have had issues with this rifle since I have had it. Many of the loads I have tried working up in it (except some anemic varget loads) has shown ejector swipes. Some of them have shown ejector swipes and sooty necks. The ones that I have worked up safely, are tack drivers in the LW barrel. I have tried many powders and bullets. I believe it was over gassing with the long 24" barrel prematurely opening the bolt. So, I put the rifle in the gun safe until I was ready to tackle it again. Months later, I now I have a stiffer buffer spring and an adjustable gas block to tame the gas down. Anyone ever experienced over-gassing?
Here is what I need help with. I want to start testing again with the fired brass instead of diving into the rest of my new brass. I fired some lighter loads through the gun after the gas block install to check function. No sooty necks and no high pressure. I then used my hornady comparator to measure the length of the case from the base to the shoulder. What I am seeing is that the shoulder is being pushed forward .015". Is this normal in a gas rifle? I tried bumping the shoulder, .001" to .002" and check for chamber fit. No go, could barely get the bolt back open. I then started bumping the shoulder back more on several cases. I had one bumped back .001", .002", .003" and .005". The first two of course gave me hell getting the bolt back open. The .003" wasn't as bad but still stuck hard. The .005" fit good, and I felt a bit of stick when pulling the bolt back. I decided to stick with this. I feel like I am excessively sizing this brass. Do you guys normally see the shoulder pushed further forward on a gas rifle? Is this due to the bolt opening? If you all have any suggestions for sizing these high dollar cases, I would greatly appreciate it.
Thanks to everyone who has the patience to read through this.
First off, I will say that I have had issues with this rifle since I have had it. Many of the loads I have tried working up in it (except some anemic varget loads) has shown ejector swipes. Some of them have shown ejector swipes and sooty necks. The ones that I have worked up safely, are tack drivers in the LW barrel. I have tried many powders and bullets. I believe it was over gassing with the long 24" barrel prematurely opening the bolt. So, I put the rifle in the gun safe until I was ready to tackle it again. Months later, I now I have a stiffer buffer spring and an adjustable gas block to tame the gas down. Anyone ever experienced over-gassing?
Here is what I need help with. I want to start testing again with the fired brass instead of diving into the rest of my new brass. I fired some lighter loads through the gun after the gas block install to check function. No sooty necks and no high pressure. I then used my hornady comparator to measure the length of the case from the base to the shoulder. What I am seeing is that the shoulder is being pushed forward .015". Is this normal in a gas rifle? I tried bumping the shoulder, .001" to .002" and check for chamber fit. No go, could barely get the bolt back open. I then started bumping the shoulder back more on several cases. I had one bumped back .001", .002", .003" and .005". The first two of course gave me hell getting the bolt back open. The .003" wasn't as bad but still stuck hard. The .005" fit good, and I felt a bit of stick when pulling the bolt back. I decided to stick with this. I feel like I am excessively sizing this brass. Do you guys normally see the shoulder pushed further forward on a gas rifle? Is this due to the bolt opening? If you all have any suggestions for sizing these high dollar cases, I would greatly appreciate it.
Thanks to everyone who has the patience to read through this.