I said I'd update this thread when I got my loads worked up. Just finding pressure today but here's the results of a quick test!
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I put on my new 25-284 barrel from preferred today (21" tikka build)
Worked up to pressure with h4831sc and h1000, the results surprised me. I expected to be able to load more charge weight than i did with the h4831sc. 50g was showing ejector marks and 51g had heavy bolt lift.
I was then doubly surprised when I reached the last of my h1000 loads with no major pressure signs (very slight primer flattening at 57g).
Can any of you make sense of this? I know h1000 is denser but holding 7 more grains seems kinda wild.
Anyone else have specifics on charge weight for 25-284 with 133 bergers? I'd like to compare notes!