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Has anyone shot enough n568 to know if it likes to deepthroat your shank like n570?
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It's a shorter barrel so it may need a faster powder than Retumbo. And If I can get 2700-2750 out of it, I'll be happy. If what I have on hand doesn't give me what I want, that will be the next option.
N570 is the optimum powder for performance in the 300 NM but know the price to be paid. I would recommend cleaning at shorter intervals than you may be used to, it definitely seems to help with consistency.
They’re great groups and nobody should diminish that
It’s the “all day long” part we should be wary of
It’s the “all day long” part we should be wary of
Good day for sure, but nothing is ever “all day long”
@secondofangle2 i definitely never stated 1/4” all day long. I wouldn’t say all day long to 1 moa cause shit happens lol.
I know.
I also don’t post my shitty groups - it’s like posting pics of fat old women, nobody wants to see that shit
I also don’t post my shitty groups - it’s like posting pics of fat old women, nobody wants to see that shit
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Oh I know you didn't, I was just clowning on previous comments about people saying stuff like that with nothing to back it up. I hope I can get close to your results when I get mine up and running
I get pressure signs at the berger starting load for 230g and h1000
so I spent a while on phone with berger today and thought I'd share, in context of posts above in this thread from this summer all the way back to 2017. (I only included a couple out of many)
the explanation they gave seems to be a big difference in case capacity between norma and lapua brass. berger data is based on quickload, not their own testing. the berger data presented so far in this thread was based on norma cases. I am using lapua and getting pressure. in another rifle, i used norma 300nm brass and did not get pressure so it makes sense to me so far. They reran the numbers using lapua brass in quickload for me and say the starting load is FIVE GRAINS lower. 76.1g H1000 for 230g and 215m primers.
I'm not sure that 100% explains my experience because I'm still getting pressure 3 grains before I get to their max load, but maybe that's a combination of the AI barrel being a couple inches longer, suppressed and perhaps tighter than the 26" quickload theoretical barrel.
FWIW my current load of 79.7g h1000 230g berg in lapua brass gives a very consistent 2914 fps in my axsr. with the new lapua-based data, the charge is in the middle of their range but still 120 fps over their max velocity of 2793
good luck
What crazy in my axsr anything near 3000 fps is a no go. Others that I know with same rifle, can exceed 3000 fps. But, mine can't. ie... bolt hard to open stuff like that.
Just trying to remember, about that ?. Cause it has been discussed before
Using my Lapua brass case capacity and other dimensions (103.84 gr of H2O), Im getting 83.7 gr of H1000 @2945 fps as max load and 97.4% fill, and 81.4 gr at 15% below max pressure 94.8% fill and 2865 fps.
I havent used H1000 before, and I typically see the larger magnums having more real world velocity than what I get in GRT, usually its within 20 fps for short action cartridges.
ETA: Playing around with seating depth, if I adjust COAL to 3.300" I get 80.7 gr as max, and 79.7gr at 2885fps and 6% below max pressure.
I havent used H1000 before, and I typically see the larger magnums having more real world velocity than what I get in GRT, usually its within 20 fps for short action cartridges.
ETA: Playing around with seating depth, if I adjust COAL to 3.300" I get 80.7 gr as max, and 79.7gr at 2885fps and 6% below max pressure.
That’s a great group. Probably quarter-inch or less if you measure center to center.
Lots of people run 245 Bergers with 85gr of N570. I'd back it off and start at about 80
For 215s N570 isn't ideal but still pretty good
N565 is a better choice, from my experience
You could use N560, but I think it's a little too fast
For the 245s and 250s, I've been using N170 and N570, both within the 84-85gr zone
N565 is a better choice, from my experience
You could use N560, but I think it's a little too fast
For the 245s and 250s, I've been using N170 and N570, both within the 84-85gr zone
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Reloading Equipment
300 Norma Lapua Brass, 230 Berger LRHT
