Thread: OCW Load Testing

Originally Posted by The Bloke

Chronograph is on the shopping list. Any suggestions for a good one?

The load that got the marks was 39 grains. Once fired Norma Brass, MUROM Primer, 2206H Powder, 150gr Nosler Ballistic Tip. (7mm08 X-Bolt).

The reloaders manual I based the load on said 40 grams - so I was thinking that the load seemed low.

The main concern was that I hadn't seen marks like that before. The primers did look ok, and the bolt didn't stick, nor did the rifle 'feel' any different with that string. I had that main mark, and another in the string with a smaller mark. I say mark, because there isn't a ridge around it. It's just 'polished' at that point. Oh, actually, now that I think about it - yes there was something else - the cartridges themselves seemed to have polished 'streaks' down the side of them as well. No bulging or so on, but noticeable. I will see if I can find the cartridge and take a photo tonight. It was only subtle.

Is the soft brass something that can develop after the first firing?

Dan himself suggested 100 yards for the testing - hence my distance - though I do agree that it's likely my shooting that's going to be the major factor. Still. Learning experience.

Magnetospeed if you want to get the best. I have progressed thru F1, CEDs (including IR screens) , Oehler and the Magnetospeed is the only one that works absolutely reliably regardless of light conditions.
V3 is due soon at the NZ agent's.