I am confused, you are saying 4350, IMR or H (same burn rates) is slower burning than IMR 4831or H4831???? I respectfully disagree.I think there is an upper accuracy node in that 280 could get to. If you stick with a 150 class bullet, you could get more powder fill in there.
The H4831 or in "short cut" form would work fairly well. H4350 is slower burning hence you could get a bit more speed.
I'd run .2 gr. Increments from a known powder and weight from your current load and shoot some ladder tests over a chrony. Go all the way until you see pressure signs and call it "max".
Then look for your velocity flats.
From there, if you havent done so, some seating depth tests in a flat area and see if they move group sizes better.
I think you left something on the table at your current velocity.
RE23 or 26 will usually outperform Hodgdon on velo, but if you can't find it, keep working the Hodgdon and maybe a primer test.... my '06 with Varget is running 2800 and you're way off that mark.
Best of luck on your hunt!
Yeah I agree. Both 4831&4831SC are slower burning the Both IMR/H4350. Well at least in all 6 of my load data manuals. I just happen to have the Berger one here at the bed side (for some light bedtime reading). The latter is 111/112 and 4831/sc is 123 (slower).I am confused, you are saying 4350, IMR or H (same burn rates) is slower burning than IMR 4831or H4831???? I respectfully disagree.
Hit a buzzard at 200 kts one day, compressor stall really bad smell, they cleaned the engine, ran good no damage...3 weeks later, hit another buzzard, at 12M feet, 400 kts engine destroyed, all blades gone. Moral, bear hunting with a switch is ungood...1500 #s of energy defines my range; thus my kills are dead in their tracks. I will admit to nice 6x bull in Montana at 95 yds with a 6mm Rem right in the ear canal to the brain.... with the same rifle and conditions I would do it again!
No the birds were F-4Ds, the 38 and F-5swere favoritesTwice the impact velocity counts for a lot, and I would expect more damage at the higher speed. I also think that you could probably get more of that buzzard into the intake on a T-38 at twice the speed. That's not a very big opening for a bird the size of a buzzard - it's about the same as threading a 6mm bullet through an elk's ear canal. You're a real needle-threader, aren't you ?
No the birds were F-4Ds, the 38 and F-5swere favorites
i Just ran my load over chrono on one day. Would it make a big difference? My elk hunt is on a general tag in Wyoming. Really looking forward to it! Still researching and trying to pick an area. Going DIY on public land. Really could use a elk in the freezer.
Speed does not kill! The heavier 160 AB will out penetrate the 140 AB. 160 much better for elk hunting.My Question for the guru's. My .280 load gives 1846 FPS with 1211 ft lbs at 450 yards. I'm shooting a 160 gr partition at 2635 FPS. My 6.5x284 load gives 2092 FPS with 1360 ft lbs at 450 yards. I'm shooting. 140 gr accubond at 2873 FPS. Since the 6.5x284 has more velocity and energy should I use this for my elk hunt? I know some of you will say I need a larger caliper but this is what I have to work with. Please give me your opinions. Thanks!
For me ALL IMR powders performs significantly different with summer vs spring/fall shootings. Vihtavuori powders (N's 160 & 133 most recently), H4350, Staball6.5 and Varget all have significantly less deviation. I here H1000 and retumbo are fairly stable as well?Ya, that load should be humming! Wouldn't be a bad idea to double check it. The other thing you could do is shoot at 450-500yd and measure how far the bullet drops. If you have a good zero (at 100yd or 150yd or 200yd - doesnt matter, but must be spot on at a known distance), it's possible to calculate an approximate velocity.
I've found imr-4831 to give a little more velocity than the H4831, but I don't know if it's worth sacrificing the temperature stability of Hogdon.
Of your two.choices (6.5x284 vs 280 rem), does one rifle carry better than the other? Do they both hold zero (or shoot to the same point of impact) in hot and cold weather?
Question for the guru's. My .280 load gives 1846 FPS with 1211 ft lbs at 450 yards. I'm shooting a 160 gr partition at 2635 FPS. My 6.5x284 load gives 2092 FPS with 1360 ft lbs at 450 yards.
Be aware that there is more in a 280. Saami pressures were set soft because of the pumps and autos.