Ok any time I get close to max with IMR 8208 XBR I am getting flattened primers, deep firing pin strikes and even a couple pierced primers. There is another thread here and the OP posted pictures, some of my primers look exactly like his from his Liberty Barrel. He marked up his loaded round and chambered it, showing it was rubbing on the bullet. Whether from a rough chamber, short neck, tight neck whatever, I don't care to get into the Liberty debate. Anyway I marked up on my 123 gr SST loads and its not marking. There is one really light rub mark that didnt go through the marker and that maybe from when I dropped the bullet extracting it.
Here are some progressively hotter loads.
![](http://i261.photobucket.com/albums/ii70/Emptyinmymag/BA9B961B-06A2-4DB8-B186-E77BA9410D57-927-00000226CF6E8C83_zpsb2ad80a6.jpg)
ETA that center primer was a Remington Benchrest Primer, I think they are softer? I am thinking that is why it flattened more, but the firing pin strike was not as deep
The last one is about .2 grs under max
This is a picture of the bullet I marked up it looks the same all the way around, though it does not show up this is the side with the light rub mark.
![](http://i261.photobucket.com/albums/ii70/Emptyinmymag/20584FF9-8F43-48FD-9713-299392D233A3_zps3lgchq6b.jpg)
There is not an adjustable gas block made that will work with my barrel and forearm. I have not been able to bring myself to paying 155 dollars for a buffer and spring so I have not tried Slash's heavy rifle buffer yet. Some one suggested I try putting lead shot in my buffer instead of the weights. This made things worse. So maybe the heavy buffer is the correct way to go as the shot probably was not providing enough of a buffering effect. Any ideas? I was really hoping I would see a mark on the bullet I have custom rifle builder up the road that would have quickly fixed that for me.
Here are some progressively hotter loads.
![](http://i261.photobucket.com/albums/ii70/Emptyinmymag/BA9B961B-06A2-4DB8-B186-E77BA9410D57-927-00000226CF6E8C83_zpsb2ad80a6.jpg)
ETA that center primer was a Remington Benchrest Primer, I think they are softer? I am thinking that is why it flattened more, but the firing pin strike was not as deep
The last one is about .2 grs under max
This is a picture of the bullet I marked up it looks the same all the way around, though it does not show up this is the side with the light rub mark.
![](http://i261.photobucket.com/albums/ii70/Emptyinmymag/20584FF9-8F43-48FD-9713-299392D233A3_zps3lgchq6b.jpg)
There is not an adjustable gas block made that will work with my barrel and forearm. I have not been able to bring myself to paying 155 dollars for a buffer and spring so I have not tried Slash's heavy rifle buffer yet. Some one suggested I try putting lead shot in my buffer instead of the weights. This made things worse. So maybe the heavy buffer is the correct way to go as the shot probably was not providing enough of a buffering effect. Any ideas? I was really hoping I would see a mark on the bullet I have custom rifle builder up the road that would have quickly fixed that for me.
Comment