I would say looking at the chart I have the wrong LR primers. I have the 5,3 LR and they are too small to use for my loadings. It looks like there is a 5,3 LR SE and I am thinking that is the primer I need but I know nothing about these primers but looks like got a brick of ones that are useless to me. maybe the SE's are larger and would be great.
I have shot the ones I have and they will fall out the back of a Norma 6XC case on the second or third firing...Yes fall completely out...I can load cci 200's, fed 210m's and cci br2's and they still fit tight so they are just smaller primers.
That's all I can say. is my experience. But I have no idea...I wonder if anyone has the SE's and can mic them I am quite sure I can mic them and they are smaller than a standard LR primer..
I mic'ed a cci br2 at .211 wide and .127 tall
S&B 5,3 LR at .2099 wide and .1259 tall I find it hard to believe that that would make that much difference...I will try and load some more...but I what I have loaded so far was no good..I would like to use them.
I run my 105 VLD's at 3,150 FPS
my 115 VLD's at 3,100 FPS out of my 6XC's and load the cci 200,210m's and cci BR2's and have no problems with loose primer pockets.. But I am hard on the brass I get 10 to 12 loads..i guess if I ran 2,800 FPS I may not have a problem..But yea that is not what I do..