Hard bolt on 'some' case???

[tootalloutdoors]

I've got a savage 112 6mm br with a .272 neck. I've been loading the same 50 lapau cases that I took from the box. They have been loaded 4 times. My question is that some of the cases have extremely hard bolt closing and opening symptums. They are not hot loads. They may be lighter loads that do it and hotter ones that don't. I should have seperated them but I haven't yet. I probably still can due to the ejector marks on the back. I'm using redding full length bushing dies with a .268 bushing. I've only neck sized so far with this die, I haven't done any full length. I think I will now unless someone has a different idea. The signs are that the shoulder need to be bumped back on them. Why only a few though? I'm thinking that these were loaded hot before,I'm still working different loads).Now they are mixed with the whole bunch of 50, and that's why there is no "pattern". Does that seem likely? I'm new to this level of things. The tight ones have no effect on accuracy. They all go in the same hole,if the load is correct). I go to the range with 10 different loads of 5. Would hot loads from the past cause this? I could probably still seperate them when I go to reload again due to the heavy ejector marks on the back. I figure I'll full length all of them though and see what that gets me. Any ideas as to why this is happening though??
Have a good one...tootalloutdoors

 

[Clarence]

total Sir:
Your cases are in dire NEED of FULL length sizing, they are toooo long from the Rim to the Shoulder and need to be bumped back.

Clarence

 

[tootalloutdoors]

Great.. I'm home from work today because of blowing snow and -20 wind chill. I guess I'll turn on the heaters and resize.

 

[Dean]

Check your case lenght.If the neck gets to long the bolt will close a little harder as well.Bump the shoulders then trim to lenght.

Good Luck,
Dean

 

[reid308]

Sounds to me like you have loaded some of the cases in that box more than others. I NEVER reload part of a box of brass. I keep one of the Sierra sheets that comes in their box of bullets
in each box of brass and write down every time it is Primed, the date and the primer used. After 4 cycles or so, I fL size it and note that on the sheet. It has been my experience,40 yrs) that variations in neck tension due uneven loadings of cases in a box cause elevation problems @ Long Range. I always have 2 boxes of brass for a paticular stage of the match. I'll use up the first box and start on the second one. The first box is ready to be reloaded. If for some reason I have 1 or 2 loaded rounds left in that box, they get fired into the berm, After telling my score keeper.
Reid