Hey guys looking for some input. I have been reloading for about ten years and this is a new one for me. I have always used Remington Primers in the past and as of recent all i was able to get was Winchester (large rifle and large rifle magnum). Anyways every odd firing probably 1 in 20 the primer leaks gas through a pinhole that's created right on the outer circumference of the primer. I googled it and seen there was a couple people having some problems. I have put these primers aside as it was starting to cause small pits the bolt face of my rifles. Came across some Rem LR Mag primers and so far so good again with my 300 win mag.
Some background: Have had this happen with two different lots WLR and WLRM that were purchased the same time.
At first i though maybe i missed a loose primer pocket or two so i took more care when priming by hand and discarded any brass that felt easier to seat primers in than others. Lapua brass for the 308 two times fired.
The loads are not high pressure, in fact they are closer to the min recommend powder level than the max in my 308 loads. Turns out that's where i was grouping the best. No flattened primers, sticky bolts or ejector marks(rem700)
I partial full length re-size so its not an excess headspace issue. Ballpark around 0.004-5" shorter than fired brass as per hornady headspace gauge.
I'm kinda at my wits end on this one, gonna load up some more (Winchester LR) but different lot number an see what happens. Below is a googled picture of what it looks like, I ended up throwing away the damaged brass so i wouldn't end up using it again. My brass did not show ejector marks like it looks in these pics though.

Some background: Have had this happen with two different lots WLR and WLRM that were purchased the same time.
At first i though maybe i missed a loose primer pocket or two so i took more care when priming by hand and discarded any brass that felt easier to seat primers in than others. Lapua brass for the 308 two times fired.
The loads are not high pressure, in fact they are closer to the min recommend powder level than the max in my 308 loads. Turns out that's where i was grouping the best. No flattened primers, sticky bolts or ejector marks(rem700)
I partial full length re-size so its not an excess headspace issue. Ballpark around 0.004-5" shorter than fired brass as per hornady headspace gauge.
I'm kinda at my wits end on this one, gonna load up some more (Winchester LR) but different lot number an see what happens. Below is a googled picture of what it looks like, I ended up throwing away the damaged brass so i wouldn't end up using it again. My brass did not show ejector marks like it looks in these pics though.



















































