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Hello all, first post here. Ive been searching the net for weeks and found numerous threads from camp fire discussing the 280 REM. Ive been working up loads trying to achieve 3000 fps with 140gr nosler BT as published manuals indicate possible. I purchased a magneto sport chrono to test loads. My rifle has the 22 & 7/8 barrel. Im not getting close to 3000 fps with max charges using RL 19, H4831. Ive been north of max charges up to 2gr without meeting velo. Im hitting 2750 -2800 with 58.5 gr H4831 and 2900 with 59 gr RL 19. I have not had any stiff bolt lifts or flattened primers with any loads. Ive tried CCI standard and MAG primers. Ive read some on slow barrels and appears I have one. Im to the point of wanting to rebarrel with a longer tube or maybe a longer tube improved. Anyone else ran into missing velocity by this margin? I know accuracy is most important but my Sako 260 REM will shoot faster than the 280 without max charges. Ive read where poster 280 REM has tons of experience on this round and would be great to hear from him.
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Welcome to the 'fire. I have a Sako 75 .260 stainless that has the exact same issue as your .280. It take over book max to get a 120 gr bullet moving at 2,740 fps which is 200 fps off book max velocity. Short of re-barreling, have you tried RL-26? That might be your ticket to getting more velocity with the cost of a barrel job.
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Hello all, first post here. Ive been searching the net for weeks and found numerous threads from camp fire discussing the 280 REM. Ive been working up loads trying to achieve 3000 fps with 140gr nosler BT as published manuals indicate possible. I purchased a magneto sport chrono to test loads. My rifle has the 22 & 7/8 barrel. Im not getting close to 3000 fps with max charges using RL 19, H4831. Ive been north of max charges up to 2gr without meeting velo. Im hitting 2750 -2800 with 58.5 gr H4831 and 2900 with 59 gr RL 19. I have not had any stiff bolt lifts or flattened primers with any loads. Ive tried CCI standard and MAG primers. Ive read some on slow barrels and appears I have one. Im to the point of wanting to rebarrel with a longer tube or maybe a longer tube improved. Anyone else ran into missing velocity by this margin? I know accuracy is most important but my Sako 260 REM will shoot faster than the 280 without max charges. Ive read where poster 280 REM has tons of experience on this round and would be great to hear from him. I've been shooting .280 Rem. since 1962 in a Remington 725, 22" bbl. I've chrono'd a 140 grains Nosler Partition bullet at 3,000 FPS using 56 grains of IMR 4350. No pressure problems. YMMV. Good Luck. L.W.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." (William Sturgis, clipper ship captain, 1830s.)
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I have looked for RL26 but have not found it. Its hard for me to believe any powder can make up the difference with published charges. Im wondering if my chamber may be a fraction larger or my barrel being a thousandth larger. Will more powder eventually get the posted speed ? It makes sense to me if a barrel is just a little larger it might require more charge to reach max pressure which should lead to max velo. Most of what read states slower powders are the way to go. But my thinking is slower powders are trying to slow down pressure in tight barrels. RL19 is the fastest powder I have tried. Im not a machinist or expert in any way so I really dont know how to measure for facts. I do know Im not comfortable just adding powder on my own.
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Here's another thought, download Gordon's Reloading Tool and learn how to use it. It takes some time to understand but it's a good tool to have and it's free. It can provide a better representation of your chamber and pressures associated with your load. The key in using the tool is to provide as accurate data as you can (don't use the defaults). Such things like water volume of a fired case, OAL, case length, bullet legth, etc. need to be measured.
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Campfire 'Bwana
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Campfire 'Bwana
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Punch it out to an Ackley
Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.
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Campfire 'Bwana
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the 280 has a MAP of 60psi, flattened primers etc. usually do not show up until at or above 70psi.
Have you checked out that crony for it's accuracy, use it on other rifles with known velocities.
find a different crony to shoot over before schitcanning the barrel or the rifle.
Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.
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Campfire 'Bwana
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Cartridge : .280 Rem.
Bullet : .284, 140, Nosler BalTip 28140
Cartridge O.A.L. L6: 3.330 inch or 84.58 mm
Barrel Length : 22.8 inch or 579.1 mm
Powder : Alliant Reloder-19 *C
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-20.0 84 47.20 2418 1818 31548 9416 86.6 1.438
-18.0 87 48.38 2480 1912 33699 9745 88.0 1.401
-16.0 89 49.56 2542 2009 35992 10066 89.3 1.365
-14.0 91 50.74 2605 2110 38463 10379 90.6 1.323
-12.0 93 51.92 2668 2213 41099 10683 91.8 1.282
-10.0 95 53.10 2731 2319 43923 10975 93.0 1.243
-08.0 97 54.28 2795 2428 46950 11255 94.0 1.205
-06.0 99 55.46 2858 2539 50202 11522 95.0 1.168 ! Near Maximum !
-04.0 101 56.64 2922 2654 53693 11774 95.9 1.132 ! Near Maximum !
-02.0 103 57.82 2985 2771 57449 12010 96.8 1.098 ! Near Maximum !
+00.0 105 59.00 3049 2890 61491 12228 97.5 1.064 !DANGEROUS LOAD-DO NOT USE!
+02.0 108 60.18 3113 3012 65847 12428 98.1 1.032 !DANGEROUS LOAD-DO NOT USE!
+04.0 110 61.36 3176 3136 70540 12607 98.7 1.001 !DANGEROUS LOAD-DO NOT USE!
+06.0 112 62.54 3240 3263 75577 12766 99.2 0.972 !DANGEROUS LOAD-DO NOT USE!
+08.0 114 63.72 3303 3392 81013 12902 99.5 0.943 !DANGEROUS LOAD-DO NOT USE!
+10.0 116 64.90 3367 3524 86892 13015 99.8 0.914 !DANGEROUS LOAD-DO NOT USE!
Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 105 59.00 3198 3179 73724 12108 100.0 0.986 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 105 59.00 2852 2529 50133 11721 90.9 1.166 ! Near Maximum !
Last edited by steve4102; 01/12/23.
Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.
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Ive used it on a 22-250 and a 260 rem. Both of those test were real close to book velocity and charge.
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And you prob won’t get 3000 fps with a barrel that short unless you want to experience very high pressures.
I have 2-.280s and an Ackley. One of the .280s has a 24” barrel and the other 2 have 26”.
I have spent a lot of time working up loads for them. I could get a bit over 3000 with the Ackley, but accuracy was excellent at 2900. I get the best accuracy out of the 24” barrel at 2825 fps and the 26” barrel shoots great at 2850.
Why the insistence on 3000. An animal will be just as dead at 2800 as at 3000. If you are shooting very long distances and feel that you need 3000, you should get a 26” barrel screwed on and then it may be iiffy.
IMR 4451 and H 4350 are the only 2 powders that they show in their data that are over 2900 fps with a 24” barrel on their website.
When I first started reloading, I was always looking for velocity. That was 30+ years ago. I found that shooting tiny groups gave me a lot more enjoyment and much more confidence in my loads.
Be safe and good luck
QM
Last edited by Quartermaster; 01/12/23.
NRA Life Member
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Campfire 'Bwana
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And you prob won’t get 3000 fps with a barrel that short unless you want to experience very high pressures.
QM Simply not true. Every load manual I have and online data says otherwise.
Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.
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2900 with a 140 grain bullet from a 22in 280 doesn’t seem bad at all. If that load was accurate I’d be happy with it. There would be no practical difference if it were going 100fps more. FWIW, IMR 4831 or one of the 4350’s might be a bit faster.
Just an opinion, but I like the idea of a 160 grain bullet starting around 2800 as a do it all 280 load. In fact, I’ve got an unfired 700 Classic 280 in the safe and a pile of 160 Partitions. I’ll probably load some up when the weather warms.
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Campfire 'Bwana
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Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.
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I can’t comment on he 280 but have seen this phenomenon with a Tikka in 30-06. It takes 2.5g grains more of IMR4350 to match book velocities. I’m not particularly troubled by…. it just means I’m extra careful when loading for it. Some rifles are slow, and some are fast (I own both). One questio:;how many rounds has the barrel seen? It is not uncommon for new barrels to pick up some speed after 75 or 100 shots.
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Noted. Point remains the same.
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Will it kill any better at 3000 than 2800 fps. ??
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3000 was just a benchmark to run off of as manuals stated achievable. Ive read about barrels that are slow may be slightly larger bore? If this is true it makes sense to me that barrel will not build pressure like a tight barrel and may require a bit more powder or maybe a faster powder to hit the 63 - 65k psi. How is it possible for a 260 rem to be so close with the same wt bullet with much less powder? I guess I am asking if a given 280 is hitting 3000k fps is it within safe pressure? Nosler manual indicates 3150 with 26 inch tube. subtract 150fps for short tube leaves 3000.
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Campfire 'Bwana
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Campfire 'Bwana
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3000 was just a benchmark to run off of as manuals stated achievable. Ive read about barrels that are slow may be slightly larger bore? If this is true it makes sense to me that barrel will not build pressure like a tight barrel and may require a bit more powder or maybe a faster powder to hit the 63 - 65k psi. How is it possible for a 260 rem to be so close with the same wt bullet with much less powder? I guess I am asking if a given 280 is hitting 3000k fps is it within safe pressure? Nosler manual indicates 3150 with 26 inch tube. subtract 150fps for short tube leaves 3000. Often times you could be losing 75-100fps per inch. It’s not really a big deal. No critter would ever know the difference. The 280 is my favorite and have shot a pile of deer with it. I’d bet your paycheck it isn’t hitting close to 3000fps with factory federal 150gr loads. I don’t have a chrono so I don’t know what my loads are hitting either.
Camp is where you make it.
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Sitting around 125 rounds.
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Ok so I had a box of Winchester silvertips on the shelf. Noticed these had a velocity of 3040 on the back of the box. Took them to the range shot 3 of them across the chrono. Three shot avg was 2953 fps and under a inch group. Primers from factory ammo showed more pressure than 61 grn of H4831. Anyone have any info on the components Winchester uses? I know the bullet looks like combined technology. It appears they are much hotter than published data. I also filled two of my fired nosler cases full of water and got 72.5 and 72.3 grs of water. filled even with top case mouth. Nosler manual was much less than my findings.
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