7mm Rem Mag help needed

Discussion in 'Reloading' started by Elkslayer1, Jul 26, 2010.

  1. Elkslayer1

    Elkslayer1 Well-Known Member

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    I really want to shoot the Berger 168 but it did not do to well at the range with H1000, 7828 and Retumbo when seated to 3.450 ( approx. .050 off the rifling ). My gun is a new Weatherby Vanguard sub-moa 7MM Rem Mag. The best that i could get with any of them was around 1 1/2".......terrible. My 300 Weatherby is .40 moa with 168 TTSX at 3300 FPS and running just short of standard COAL. I am going to take the 168's bergers back to around 3.350 and some at standard 3.290. I think these Weatherbys' like them shorter with all the free-bore???????? PS.....I did use different powder charges all the way up to max with each powder. The 160 accubonds with 66 grains fo H1000 at 3.360 shot around 1" and 3064 FPS. I also think the accubonds will do a little bit better pulled in??????? what do you guys think????????
     
  2. 7 loader

    7 loader Well-Known Member

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    You may need to check with berger, but it is my understanding that the vlds should be touching the lands. Another loader with more experience with bergers than I should be able to tell you more.gun)
     

  3. kiwi3006

    kiwi3006 Well-Known Member

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    Read this article about how to get the best from your bergers.

    http://www.longrangehunting.com/for...accuracy-berger-vld-bullets-your-rifle-40204/

    I use 168 bergers in my 7mm mag. I have them seated so that there is a faint mark on the projectile when I chamber a round. I don't have a measuring device so I can't tell you how far into the lands they are, but it aint much.

    I use federal brass, federal 215 primer and 72gr H1000, getting 3058 fps from a 26" barrel. Shooting 0.5 - 0.7 MOA at 100 yds.

    If you can't get the bergers to shoot then try the 162 a-max, it is an awesome bullet on deer at long range. I have shot animals from 358 - 638 yds with it and nearly all have dropped on the spot.

    Stu.
     
  4. 300rum

    300rum Well-Known Member

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    Hi,

    I have a 7mmREmMag in Weatherby vanguard rifle to.
    I used 168VLD, with 70.5gr H1000 (72gr no pressure signs) , 250 CCI Primers, 0.010in the land.
    Shots all day one cover lead group.

    At 950yrds it is very borring shooting.

    Berger likes to be seated in land.
    If you are hunting do not chamber a bullet unless you are shooting this.

    find the max load go down, 1-2 grain, and play with seating depth till the group in shrinking.
    Do not go over 0.015 inland.

    Best groups are 0.010 off land to - 0.010 in land.
     
  5. bowhunthard

    bowhunthard Well-Known Member

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    Berger bullets are reported to shoot best when load extremely close to or into the rifling, load them further out. Another bullet you could try is the Hornady 162gr A-MAX. I'm shooting them with a 0.020" jump to the lands, and am shooting about 0.3" five-shot groups consistently (Savage ss sporter barrel w/Accustock and Accutrigger). I'm also loading with H4831 but Hybrid 100V was also acceptable. my loading is only 60gr. for the H4831.

    Good luck.
     
  6. 300rum

    300rum Well-Known Member

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    Just a second....
    You mentioned your rifle is new.
    I do not want to scare you, but did you take everything out and put them back, put proper torque on screws, rings, base, rail, rifle screws.
    Do not trust the sales person from the store, or the factory settings.
    make sure the barell is freefloated, if you can insert a doubleside business card between barel and stock, all the way up to the action you are ok.
    2nd think to do is give rifle 100-150round the tube(cheap ammo) , before you are starting to see tighter group.
    By some reasons, this was happened with my Vanguard too.
     
  7. Elkslayer1

    Elkslayer1 Well-Known Member

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    300RUM, can you help me measure to the lands? Do you just look to see when they first start touching the ogive of the berger bullet? Or do you use the split case method? I am thinking that my lands are at 3.452......????
     
  8. Elkslayer1

    Elkslayer1 Well-Known Member

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    300RUM can you give me your coal? Thanks
     
  9. 300rum

    300rum Well-Known Member

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    Every barel is different, and for your safety YOU HAVE TO CHECK YOUR BAREL.

    You can use 2 methods.
    The most acurate is the Hornady or Sinclair method.
    Determining Bullet Seating Depth | The Reloading Press

    You can use the old fashion too, but is not as acurrate. Can get you there for sure.
    Just unscrew the Seating dies all the way up
    take a resize case (WITHOUT PRIMER)
    seath a bullet
    take a lighter and heat the bullet till you get black color all around
    - insert slowly in chamber and close the bolt.
    remove slowly the bolt, and check for rifling marks on bullet.
    NO marks, just screw the die down a little and follow all the above.
    When you get slight marks on bullet, just back little bit and repeat in small steps till you see just a tiny hair mark.
    This is your COAL = touching the land mark.
     
  10. Elkslayer1

    Elkslayer1 Well-Known Member

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    Thanks 300RUM. I am going to the store to buy the Hornady tool. Just for fun, can you tell me what your OAL is? I will post mine in a day or two.
     
  11. 300rum

    300rum Well-Known Member

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    So my Land is at: 3.422 with 1.427 ogive
    Add another 0.010 = 3.423 OAL from primer to tip of the ogive.
     
  12. Elkslayer1

    Elkslayer1 Well-Known Member

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    So tip of the ogive would be tip of the bullet right? Those bergers seem to have slanted tips on the ends. It would be great if I could measure from end of case to where the bullet ogive goes back to caliber size, but it seems that would be hard to find each time. So do I just set my die for total overall length once I have found OAl with the guage? Sorry for all the questions and thanks for your time.
     
  13. 300rum

    300rum Well-Known Member

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    Yes, you can measure them from the base to the ogive contact area , but you need the gauge from sinclair.
    Yes, setup your dy for the OAL, BUT REMEMBER TO USE THE SAME BULLET SIZE.
    Try to measure some bullets to have the same lenght from tip to bottom, and use this ones for finding the LAND and also for setting your die.
     
  14. bowhunthard

    bowhunthard Well-Known Member

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    Your best bet (if you're into reloading seriously, or are going to be) is to get the Hornady OAL gauge and the modified case for the caliber you want to check.

    Check it out here: Hornady Lock-N-Load Overall Length Gage Bolt Action - MidwayUSA
    Hornady Lock-N-Load Overall Length Gage Modified Case 7mm Remington Magnum - MidwayUSA

    You can buy them most places, including MidwayUSA. I love mine and use it constantly for all my rifles, because almost all bullets will have a different OAL for the same jump, and also most bullets prefer a diferent jump than one another, especially in a specific rifle.

    If you're really looking to be consistent I'd get a set of bullet comparators also, you measure from the ogive of the bullet instead of the tip. They just clamp onto your caliper with a thumbscrew, and are super fast and easy to put on and off.
    Hornady Lock-N-Load Bullet Comparator Basic Set with 6 Inserts - MidwayUSA

    Good luck.

    Guess I'm a little late lol, sorry for repitition (I was on the first page only).
     
    Last edited: Jul 28, 2010