Thanks marksman...ive wondered that myself, & you're most likely right.
I have done some running in regime, in shoot a few clean etc.
As it stands now, i cant get it to foul at all-not carbon nor copper...last lot was 28 rounds without a patch & it only took 2 patches & it was cleaner than the water in Gwions favourite trout stream...!!
Anyway, ive shot 50 odd rounds without a jam...thinking about what you've said maybe ill do some forming with a jammed bullet for the rest of the cases, then move to load testing again.
Then ill have the stress of OCD not allowing me to mix the first 50 cases with the 2nd 50 properly formed cases.
Another point ive thought about since, is that the extractor is quite strong on this bolt, & it really puts pressure on the case (obviously pulling the front/bullet end upwards while sliding rearwards), so some exaggerated markings may be left from dragging the case out before i can get my fat finger in the ejection port to push down on the case.
Ah well...thanks all for the input...when/if i have any discoveries ill update.