Thread: 270 not liking ELD-X. What should I try?

Have you got a COAL gauge and do you know the max COAL (i.e. ogive touching lands)?

Use the marker pen on bullet method to try and determine it if you haven't got a gauge or can't borrow one. @dannyb did this and he's not far away from you?

I ask this just to make sure you can seat the bullet in the right "zone", so that you're neither too close or in the lands, nor too far away.

The ELD-X has quite a thick jacket on the bearing surface so when it gets shoved into the lands, it takes more push for the lands to bite into the jacket than some other bullets. So it can spike pressure earlier than you might expect, especially if its only 5 or 10 thou away from touching, or actually touching already.

As for 40mm at 235m, mate that's showing you there's nowt wrong with the rifle, so others have suggested, start the ladder again at a middling powder weight, a grain or more below where you got pressure, and go up in 0.2gr increments. Find the loads where the velocity graph flattens, pick the middle weight, and start to alter seating depth from there. "Should" see you come right.

What pressure signs did you get exactly?

As mentioned above, you really don't need to push these 145gr bullets at light speed, as long as you are within the ~2000-2400fps window when the bullet hits, you'll be fine. That's about a 500m bullet / load and that's plenty to be getting on with.