realoading for the 260 rem

Discussion in 'The Basics, Starting Out' started by airstream, Feb 27, 2011.

  1. airstream

    airstream Well-Known Member

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    As I wait on the arival of my 260 rem and nightforce ( Im so excited I could pee my pants ) I am gathering components. I ordered BERGER 140gr VLD match hunting and LAPUA 139gr senars BTHP. Would anyone be willing to share any of their reloading recepies with me . I am considering IMR-4350 or Reloader17 , but can't find much on these two bullets. I am fairly new to reloading and just stick with what is in black and white in several mannuals. I no nothing of presures or how one would even go about measuring pressure. What can you tell me about ( pressure ) . Dont worrie I do know my limitts and will not jump into anything that exceeds my mental compacity.:rolleyes:
     
  2. Joaquin B

    Joaquin B Well-Known Member

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    I use Berger 140s and Sierra 142s to shoot 500 meter ram silhouettes at 500 meters, propelled by 41.4 grs. of H4350 in lapua cases, using Federal 210M primers. It is not a very hot load at 2670 fps, but very precise.
     
  3. Coyboy

    Coyboy Well-Known Member

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    And for reference I shoot 45 grains of H4350 and it is a top end load and may be over in some rifles with 140 grain a-max. I have a long throat so there is a bit of jump on my bullets which lessens the pressure slightly. 2855 in a 23" barrel.

    H4831 is a good powder in the 260, it produces the best groups in my gun with 45.5 grains, that is a mild load in my gun at 2680.
     
  4. blipelt

    blipelt Well-Known Member

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    Thanks airstream, all that is left on my 260 is pillar and bedding. Anyone try the 308 palma brass for your 260 yet?


    Brent
     
  5. Kevin Thomas

    Kevin Thomas Well-Known Member

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    You'll be better off just using the straight 260 Remington brass hre, rather than reforming the Palma cases. With the slower burning powders involved and the likelyhood for colder weather (I'm assuming hunting's on the agenda here?) when using this ammo, you have the very real potential for hangfires or outright misfires with that small primer. First batch of Lapua 260 cases are currently enroute, and should be here within the next few weeks. Give it a few weeks and give Graf's or Kaltron Pettibone a call.
     
  6. blipelt

    blipelt Well-Known Member

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    Thanks for the info, I will wait for the 260 brass.

    Brent
     
  7. airstream

    airstream Well-Known Member

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    I have a question. If you guys give me reference of lets say 45 grains h-5350 behind a 140 grain FBHP from hornady, can I use 45 grains of h-4350 behind a 140 grain BTHP from berger. is this safe I once read that it would affect pressure? I know nothing about pressure and I only use suggested safe loads from mannuals. I have only reloaded about 700 rounds ever but with great results, I am self taught and should not do alot of guess work on my own.
     
  8. Coyboy

    Coyboy Well-Known Member

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    airstream, no it is absolutly NOT safe.

    Always start lower and work up, Never exceed book max.

    If anyone gives you a internet load it is a guidline only and should be worked up to in YOUR rifle.

    In general if the book says 140 Nosler partition 41- 43 grains is starting to Max, And you want to shoot a 140 vld, then start at 41 grains and work the load up increasing the powder as you shoot over a cronograph. Any signs of pressure or velocities that are above the norm for this cartrige bullet, then stop and go no higher.

    If you don't know what pressure signs to look for buy a good load manual that has the instructions in it and learn how to read pressure signs.
     
  9. Kevin Thomas

    Kevin Thomas Well-Known Member

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    Airstream,

    Actually, it probably is safe, but CoyBoy's advice is well founded. Don't change components indiscriminately or you could (and eventually, will) run into a nasty surprise.

    Nothing wrong with being self taught, so long as you do it correctly. Again, CoyBoy's advice to get good reliable manuals (prefereably, several) and read the covers off them. Most guys don't, especially if they've got Uncle Bob teaching them how to reload. You're on your own here, and that may work to your advantage. Read the books. Learn what pressure signs look like, and how to interpret them, and you'll be good to go. With time, you'll start to "get" what changes can be made, and how they'll likely impact the final load's pressures. In your example of two different bullets, same weight and style but from different makers, they may very well interchange. Especially if both are jacketed, lead-cored and of very similar design. Differernce in ogive shape, where they engage the rifling, core material (lead? 1.5% antimony? 3% antimony?), this all makes a difference. A 30 cal 165 grain lead cored jacketed bullet will behave very differently than a 30 cal 165 grain monolithic solid like a Barnes, and this is where you can get into some serious trouble. Even within the same maker, there can be serious difference that can bite without warning. Take the 168 grain SMK for example. Many guys have tried to make a hunting round by simply substituing that same makers 165 grain GK-HPBT for their match bullet, with no other changes. The 165 has a very different ogive and a harder core material. Seated to the same OAL, you'll jam the rifling badly, and pressures will kick up drastically.

    Take your time here, work slowly, and don't ever hesitate to ask questions.
     
  10. airstream

    airstream Well-Known Member

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    Thank You fellas, I will do my homework and always be safe. Besides my saftey I realllllllllly have no interest in blowing up the cooper I have on order. Thanks again for all the help.
     
  11. novaman64

    novaman64 Well-Known Member

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    Not done with load development yet...

    Running a mix of Remington brass some 260 and some 243.. Winchester primers...

    Playing with H4350 and RL17 under a Berger 140vld hunting bullet. Worked up to 43 grains of H4350 with no pressure signs, still need more but out of bullets... On the RL17 I have gone up to 44.0 grains, no pressure signs and shooting the most accurate so far with that combo. Going to try going hotter as soon as I can get soem more bullets and find some time...

    Then I will need to chrono the loads... Right now the 17 is grouping around 3/8" at 100 yards though.. Thats coming out of a 26" Benchmark 3 groove 1:8 barrel. I would need to go home and double check specs but I think I am at 2.93 COAL and .015 off the lands...
     
  12. Vulture

    Vulture Member

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    I'm in the same boat as airstream, new to reloading and mid process on a .260 (new to that chambering as well). Are there any specific reloading manuals anyone prefers as far as the fundamentals go?
     
  13. airstream

    airstream Well-Known Member

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    VULTURE, I have had a couple of mannuals , and I got to say i have learned more on this web sight than in the books. Put a specific question out there and the people here will attack it, giving you great detail about things such as jumping or jamming the lands, anything, I for one am going to keep on asking questions. and please keep me informed on what you learn on the 260. I would go to books a million where I could open a book and check to see how much littiture is inside as opposed to data.