I do have a 28” barrelIve run mag length to mag length-.120". From memory, mag length - 0.030 has produced best results with the 225s, regardless of powder.
I do notice you are running .4gr hotter and 60fps faster though. I have not tried anything more than 77.5gr. Maybe I should push it up a little. That would certainly change the ignition characteristics...
Lance, if you run out of Retumbo or N570 let me knowI am awaiting my Manners LRH and then all my parts get dropped off at the gunsmith for my .300WM RM. I only have about 32# of H1000 and 2500 215s, so I hope those will work...
Seriously. But, all kidding aside, I also have about 1200 of the 200.20x Hyb, 600 of the 230 OTMs, and 16-24# of N565 & N570, and 6# of Retumbo just in case.
Well that’s great and all but I’ve never had an issue with it. Your issue sounds like tension, ignition or even the powder being exposed to humidity. I have seen powders that were exposed to elements too much or too long and deteriate and acts like just as you have described. Sometimes h1000 likes to be pushed harder.All those details were purposefully excluded from my post because they are constants. I can prep 2 loads back to back, with exactly the same process and exactly the same components except powder, and even charge adjusted to the same velocity; H1000 will shoot between 1 and 2.5", 7828 will shoot between 0.13" and 0.6"...
The post is simply an exploration in H1000 tricks and tips.
Where did you hit pressure? I can’t get a heavy bolt lift, ejector mark, or flat primer with h1000 and ADG brass with 225eldm in my 300prc. I went all the way up to 80.9grains. QL said max load was 81.5.That's probably pretty close to my 26" barrel, ADG brass and 77.5gr H1000 pressure wise then.
I’ve never had any magnum cartridge shoot H1000 worth a except my 338 edge. I’ve used it in 300 roy 300 whinney 257 roy but only my 338 edge liked it which I’m happy with because it’s easier to find gold nuggets in the snow than find H1000As the title states, my 300 PRC hates H1000. It likes MagPro more and loves 7828. Because I want it to like H1000, ive got to thinking that here has to be a reason besides "just because".
I've tested with 215 Bergers and 225ELDM. In both cases, the powder preference was clear. All else was the same. Same ADG brass, same sizing, same primers tested, all else was equal.
H1000 also earned me one heck of a carbon ring.
There has to be a reason. H1000 is obviously slower than 7828. Is there a chance that my neck tension is too light to pressure up with the slower powder? Something else?
Who has ideas? I really want H1000 to work, but I'm near ready to give up on it.