Have a look at this photo of some shell cases I fired yesterday.
The loads are increasing from 39gr to 39.5 gr left to right, there are 6 rows 0.1 gr increments, running diagonally bottom left to top right.
Row 6 - 39.5 is getting close to the maximum 0f 40.3 gr (VV data) and I'm not going any higher.
Look at the powder marks on the shoulders increasing as the load increases.
I had low pressure signs down at 35 grains and they gradually decreased as I passed 38.5. I thought they would go completely as I passed 39 not come back.
So, is this also a high pressure sign? There are no pressure signs/marks on the heads. Bear in mind the rifle at this point is probably getting quite dirty inside.
Your thoughts appreciated.
243, 87 grain head, winchester brass and primers. VV N140.
Cases are all fired once and neck resized.