7mm rem. Mag 1000 yards?

Discussion in 'General Rifle Discussion' started by big440dart, Feb 6, 2012.

  1. big440dart

    big440dart New Member

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    I have a winchester model 70 in a 7mm mag if im shooting 100 grain bullets what kind pf drop would i expect at 1000 yards
     
  2. c3shooter

    c3shooter Administrator Staff Member

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    With that bullet, drop at 1000 would be measured in yards.

    Different bullets have different ballistic coefficents. Part is driven by weight/diameter, part by shape. The higher the BC, the better at very long range. All of the 100 grainers have pretty low BCs.

    With a 200 yard zero, at 300 it will be about 5.5 inches low. At 400, 17 inches, and at 500, 36 inches. From there it sinks like an rainbow.
     

  3. Marlinman

    Marlinman New Member

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    C3 told you the truth. If you want to shoot that far w a 7mm mag and its for target shootin then try something like the Black Hills premiere 185 gr BT Fmj. Or the barnes tsx in 175 grain BT ballistic tip.

    God didnt make all men equal colonel Sam Colt did
     
  4. big440dart

    big440dart New Member

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    Ok but im kind of confused with a heavier bullet wouldnt it just drop faster???
     
  5. Marlinman

    Marlinman New Member

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    No bc it has more power behind it in momentum. It also has a better bullet coefficient(BC).

    God didnt make all men equal colonel Sam Colt did
     
  6. JonM

    JonM Moderator

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    How far can you throw a ping pong ball compaired to to throwing a golf ball?? same principal applies to bullets.

    You make a bullet too heavy your then thowing a bowling ball. The bowling ball does more damage at close range but you cant get it out very far.

    Bullet design is a balance between weight and aerodynamics and diameter. Just because its a screamer at short range doesnt always hold true once you get downrange a bit.
     
  7. purehavoc

    purehavoc New Member

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    at a 200 yard zero with a Hornady SST 162 gr your looking at 34.8" drop @ 500 beyond that it really really falls off quickly after that range . if you looking at 1000 yards I would be looking at a different rifle , Something more like a 50 BMG , 6.5 to be honest. there are plenty of rifles capable of 1000 yards but if your looking for something that wont drop 10 ft there are better choices
     
    Last edited: Feb 6, 2012
  8. Marlinman

    Marlinman New Member

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    6.5 creedmore, 7.82 warbird, 338 luapa, 7mm ultra mag comes to mind

    God didnt make all men equal colonel Sam Colt did
     
  9. Marlinman

    Marlinman New Member

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    Exactly

    God didnt make all men equal colonel Sam Colt did
     
  10. jpattersonnh

    jpattersonnh Active Member

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    I had to calculate the 100gr at 3500fps. 375" drop w/ 100 yard zero. About -10+ yards!
     
  11. theropinfool

    theropinfool New Member

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    Check out bestofthewest.com or longrangepursuit.com. I'd throw a link in, but i don't know how from an iPhone. These guys have 7mm rem mags taking elk at 900+ yards. They use Berger 168 gr VLD (Very Low Drag) bullets. It's like these other guys said, if you throw a small rock it goes really fast, but not very far. If you throw a big rock, it puts a big hole in the ground, but doesn't go so far. You have to find the right balance of weight and aerodynamics. Look up bergerbullets.com. They have some cool videos that explain it better than I can. They show how a 7mm with a 168 Berger has more energy down range than a 30-378 weatherby with a Barnes. Seriously, before anybody argues with me, watch the video and get out your calculators and figure it out for yourself. My $0.02
     
  12. Marlinman

    Marlinman New Member

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    I was just sayin what works for me.

    God didnt make all men equal colonel Sam Colt did
     
  13. purehavoc

    purehavoc New Member

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    personally I like the 338 luapa and the 6.5 creed, reasonable to shoot compared to a 50 bmg and they will get you out there where you want to be and dont skip on the glass , high quality glass and big power isnt cheap either
     
  14. big440dart

    big440dart New Member

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    Ok ya that makes sense. Does anyone know how hot you can load a 162 gr. Round before it becomes inefficent?
     
  15. Marlinman

    Marlinman New Member

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    Its not so much that as how hot can you load the brass capabilities and how hot the gun can stand.

    God didnt make all men equal colonel Sam Colt did
     
  16. Marlinman

    Marlinman New Member

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    7.82 is a great long range round if you reload and get the brass.

    God didnt make all men equal colonel Sam Colt did
     
  17. theropinfool

    theropinfool New Member

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    Sorry man, wasn't going after anyone, it's a hotly contested issue around the guys I run with, guess i just assumed it would be here too. I apologize for the misunderstanding.
     
  18. Marlinman

    Marlinman New Member

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    Oh it is w the guys i run w also but most of them have come to respect my knowledge and ammo recipes. But i also know im nowhere near the best at it and that MY loads for MY specific rifles dont work as well for others.

    God didnt make all men equal colonel Sam Colt did
     
  19. c3shooter

    c3shooter Administrator Staff Member

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    Would also mention- at THAT range, your ability to "read the wind" becomes critical. A 10 MPH wind will move a bullet about 10-12 feet laterally. Again, weight of the bullet plays a large role in bucking wind.

    Ballistic coefficent is a mix of streamlining, density of the cross section, etc yada yada. Bottom line is how much OOOMPH it still has when it gets there. You will also find that HOTTEST is rarely the most ACCURATE load.

    Think about it for a minute- you have a 28 gram steel ball bearing. I have a 28 gram dart. want to try for 100 ft?

    And consider- a paper target holds fairly still. However, a man/moose walking at a brisk walk will move about 13-16 ft in the time your bullet is in flight.

    Bullet drop is such that it will exceed to range of adjustment on a lot of scopes. There are scope bases that are made for extreme long range- they are higher at the front end. Or you could try aiming in the air about 28 feet above the target (yeah, does not work really well)
     
    Last edited: Feb 6, 2012
  20. jpattersonnh

    jpattersonnh Active Member

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    Hey C3, Aren't Bases for long range higher in the rear as to give better muzzle elevation to scope alignment?

    Ropin, I here you. I can relate as I shoot a 7mm Rem Mag. I love the light recoil w/ Barnes 160gr tsx @ 3000fps-. At 500 yards it has over 1600fpe, more then enough for anything that walks in the lower 48.