Alaskapopo
10-11-2013, 01:14 PM
http://i59.photobucket.com/albums/g299/355sigfan/Semi%20Auto%20rifles/Precisionrifle_zps44c2ccbc.jpg (http://s59.photobucket.com/user/355sigfan/media/Semi%20Auto%20rifles/Precisionrifle_zps44c2ccbc.jpg.html)
This gun has given me some challenges. When I first got the barrel installed it would not cycle. I sent it to ADCO to open the gas port and to pin the gas block on for me. It came back and worked better but still not 100%. I tried a lower mass buffer to help and a lighter buffer spring. But still no joy. I then sent the barrel to Krieger and they opened the port a big more. I went back to a full mass rifle buffer but kept the lighter spring. Rifle ran fine at first but I would get cases stuck in the chamber. The same cases that got stuck would feed and cycle fine in my other AR's. I learned about a small base rifle sizing die and that fixed that problem. Then my zero wandered. I tighten everything on the mount and checked the scope 's zero stop lock screws and after doing that the zero remained good so far knock on wood. I am still getting failures to feed where the bullet nose hangs up on the feed ramp with one of my loads using 77 grain SMK's. The problem got worse the more I shot the rifle. I was thinking it may still not have enough gas but the bolt locked back at the end of the magazine each time with no issues. I tried a full power recoil spring and the problem got worse. Love how its shooting for accuracy now but I need to get the reliability in line. Any ideas.
Also is there any downsides to using a small base dies to size the brass in my other rifles that don't need it. I was thinking of making ammo specific for the Krieger barrels chamber so I don't fix what is not broke with my other ammo for my other AR's. I know this is too much scope for a gun like this but I have the same scope on my precision bolt action build and love it and Vortex does not make another Razor in a more appropriate size (3-15 etc)
Pat
This gun has given me some challenges. When I first got the barrel installed it would not cycle. I sent it to ADCO to open the gas port and to pin the gas block on for me. It came back and worked better but still not 100%. I tried a lower mass buffer to help and a lighter buffer spring. But still no joy. I then sent the barrel to Krieger and they opened the port a big more. I went back to a full mass rifle buffer but kept the lighter spring. Rifle ran fine at first but I would get cases stuck in the chamber. The same cases that got stuck would feed and cycle fine in my other AR's. I learned about a small base rifle sizing die and that fixed that problem. Then my zero wandered. I tighten everything on the mount and checked the scope 's zero stop lock screws and after doing that the zero remained good so far knock on wood. I am still getting failures to feed where the bullet nose hangs up on the feed ramp with one of my loads using 77 grain SMK's. The problem got worse the more I shot the rifle. I was thinking it may still not have enough gas but the bolt locked back at the end of the magazine each time with no issues. I tried a full power recoil spring and the problem got worse. Love how its shooting for accuracy now but I need to get the reliability in line. Any ideas.
Also is there any downsides to using a small base dies to size the brass in my other rifles that don't need it. I was thinking of making ammo specific for the Krieger barrels chamber so I don't fix what is not broke with my other ammo for my other AR's. I know this is too much scope for a gun like this but I have the same scope on my precision bolt action build and love it and Vortex does not make another Razor in a more appropriate size (3-15 etc)
Pat