So you are using a neck bushing die and have not been full length sizing or using a body die?
6.5 PRC donut in Lapua brass
- Thread starter KyleC
- Start date
Help Support Long Range Hunting Forum
Okanogan
Well-Known Member
I'm looking at your picture from my phone but if I'm seeing it correctly it looks like the marks are a little above the web. I'd suggest searching elsewhere on the forum for the PTC clicker problem. If I misinterpreted the photo, it won't hurt for you to be aware of the issue but I don't think it is related to the donut issue.
Full length bushing die
Rifle was chambered with AW2 reamer
The springback for extraction gets less and less the more times you fire the brass. Its affected by the quality of brass, if you anneal, neck size vs full length size and how many firings. The 1x factory cases wont compare to 4x reloaded cases.
Run your brass thru your FL sizer and it will chamber fine.
Consider annealing each time for longer brass life. Maybe that will also help with any donut.
I do anneal each time. Since my brass already has a donut is it worth saving?
ok you said above this piece has been fired 4 times and not resized? Also read post # 30. The PRC has a known issue where the chamber is not big enough near the web and can cause hard chambering or " clickers" when opening the bolt. Hornady brass is smaller at the web and usually is not a problem. Premium brass is thicker and can be a problem.
Yes, especially for Lapua brass.
But I would replace the bushing die for a standard FL die with an ID expander to smooth out that donut inside without having to remove material.
According to who? Never had issue bumping cases .003-.005.
RH300UM
Well-Known Member
According to me
Good for you
The standard has been 2 thou for a bolt rifle for decades
I don't think an extra .002 in sizing is causing his issue. Plenty of target guys opt for a looser .003 .004 and have no issues and get plenty of case life.
mdmiller
Well-Known Member
You might want to take .015-.020 off your shell holder so you won't have that hard cam over issue!! My 2 cents..
Kyle, I would full length size the brass after every firing. PMA makes some very nice mandrels, run them through the neck after bushing sizing, and this is standard procedure for many of us. The bushing puts a kink in the neck, the mandrel straightens the neck.
Sounds like it is time to contact K&M.
I have many Lapua cases that have been fired 30+ times with no doughnut, but they are not this caliber. I wonder if you have been annealing too far down into the shoulder? I am guessing, of course. Doughnuts after 4 firings....hummm.....? Kyle, it should not be just you having this problem in this caliber. The question is, did you form the 6.5 PRC from 7 PRC, which would explain the problem?
Sounds like it is time to contact K&M.
I have many Lapua cases that have been fired 30+ times with no doughnut, but they are not this caliber. I wonder if you have been annealing too far down into the shoulder? I am guessing, of course. Doughnuts after 4 firings....hummm.....? Kyle, it should not be just you having this problem in this caliber. The question is, did you form the 6.5 PRC from 7 PRC, which would explain the problem?
