6 BR-DX pointers for newbie

Discussion in '6BR, 6BR Improved & Wildcats' started by alphapygmy, Mar 20, 2017 at 12:53 PM.

  1. alphapygmy

    alphapygmy

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    Looking for pointers in the right direction for this new to me cartridge, I usually do 6.5's. I chambered a Bartlein 29" .237 bore 8 twist for my Savage PTA. I throated it out to keep the bullets up off the donut area so I don't know the exact freebore length. Just started playing with it using 105 Amax to get it broke in. Hydroformed then once fired brass measures 40.3 grains of water. I've shot less than 50 rounds so far but with the Amax Varget shoots much better than RL15. Is H4895 worth a try in this case? After I get a 100 rounds through it I'll switch to trying 105 VLD and 108 BT. Any tips or pointers? Thanks!
     
  2. mr.big

    mr.big

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    yes H4895 can shoot well but work up slowly at it is pretty hot,,somewhere around 31.5 will be close to max,,my barrels really like 32.3 Varget and 36.2 H4350,,

    it will depend on how good your firing pin fits the hole in the boltface on which primers you can use,,if it is loose it will crater with just about everything so you will have to use CCI450,,if you have tight fit and can use softer primers I had my best groups and ES with WW WSR primers but they will pierce if your firing pin is sloppy,,

    my favorite load is the 105 VLDH orange box bullets seated .010 in the rifilings and 36.2 H4350,,Varget RL15 and 4895 have all shot well also but it seems H4350 shoots well in more conditions and I dont have to adjust my charge hardly any ,,

    the longer neck on the BRDX will allow you to use the 95 87 and 80 gr bullets with the longer freebore also and is one reason I like it so much,,

    BRDX brass is extremely stable and will last a long long time unless you go overboard with the faster powders like 4895,,
     
  3. tclaunch

    tclaunch

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    RL15 and Varget may be as far as you need to look, seems most folks find love with one or the other, just be sure you don`t try and make fast chrono numbers, the bullet usually likes 2950 to 2980 in the 105 class in this case. Load a ladder and use 105 Hybrids .008" to .012" off the lands and work up in .2 tenth increments out to at least 300 yds and watch for vertical to go low. Just remember you`ll never shoot a group any smaller than how tall it is. Test primers, BR4`s can be great as well as 450`s, and Federal 205`s make good numbers on the chrono when combined with Varget. Jump the 108`s .020", .030", and .040" fantastic bullet.
     
  4. alphapygmy

    alphapygmy

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    Thanks for the info. I did have Gretan bush my firing pin and that did make a nice difference when it was a 6.5x47. I have some orange box 105VLD and 108 BT. I skipped on the 105 Hybrid as there was talk it needed a little more twist and I'm down almost at sea level. I was just surprised at how poorly RL15 did vs Varget. Almost 3/4 inch vs .310 inch for 5 at a 100 yards, two groups for each powder. When it's more broken in I'll do a good ladder, now I'm just getting some rounds through to get a feel for it. I'm sure the RL15 can do much better if I work it up properly.
     
  5. tclaunch

    tclaunch

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    Start low on powder and work up. Lots of folks miss the tune from to much powder chasing the chronograph.

    8 twist works fine for the Hybrids.
     
    Last edited: Mar 20, 2017 at 8:56 PM
  6. alphapygmy

    alphapygmy

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    I'm in the .3-.375" range for 5 shots at 100 with 105 Amax and Varget. 31.2 gr is getting me around2875 so I'll keep working it up. I'm trying to get all 100 cases shot once before I break out the Bergers so it's just Amax's for now. How about IMR 4320? I have a few pounds and burn rate seems close enough to try.
     
  7. tclaunch

    tclaunch

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    I'd certainly use the 4320, but for fireforming.
     

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