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Thread: .308-30XCB-2490fps-10 twist barrel.

  1. #21
    Boolit Master waco's Avatar
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    It’s around .013” if memory serves.
    I’ll check tonight.
    The fear of the Lord is the beginning of knowledge: but fools despise wisdom and instruction.
    Proverbs 1:7

  2. #22
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    rockrat's Avatar
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    plumb bob wouldn't help at our range as it would be angling off to the side because of the winds!!!

    Good shooting!!

  3. #23
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    ShooterAZ's Avatar
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    Impressive shooting waco. That 30XCB mold has been on my " need to get" list for a while now. I see that you are using RX15, have you tested that boolit with IMR4064 or Varget?

  4. #24
    Boolit Master 35 shooter's Avatar
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    Very nice Waco!

    I bet the 2 high shots are from bbl. heat as you said.... The main group is very stable and the high shots are in line with that group.
    My sporter weight 308 bbl. does the same if it gets too hot on a longer string like that.
    When I slow the shot rate a bit, they go right back in the group on 10 shot stings @ 2450 fps. And the xcb boolit.
    How much more speed do you think is left for the rl15 powder?

  5. #25
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    Quote Originally Posted by rockrat View Post
    plumb bob wouldn't help at our range as it would be angling off to the side because of the winds!!!

    Good shooting!!
    Huh, I was of the belief that the wind pushes the whole bullet to the direction it's blowing rather then turning the nose to that direction. If it turned the nose Wow could you imagine how far off target the bullet would be then? Think about it, when you're driving your truck or car and a very strong wind hits your vehicle from the side does it make it steer off the road? No.

  6. #26
    Boolit Master waco's Avatar
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    Quote Originally Posted by ShooterAZ View Post
    Impressive shooting waco. That 30XCB mold has been on my " need to get" list for a while now. I see that you are using RX15, have you tested that boolit with IMR4064 or Varget?
    Both Varget and 4064 are on my list as well as a few others...
    The fear of the Lord is the beginning of knowledge: but fools despise wisdom and instruction.
    Proverbs 1:7

  7. #27
    Boolit Master waco's Avatar
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    Quote Originally Posted by 35 shooter View Post
    Very nice Waco!

    I bet the 2 high shots are from bbl. heat as you said.... The main group is very stable and the high shots are in line with that group.
    My sporter weight 308 bbl. does the same if it gets too hot on a longer string like that.
    When I slow the shot rate a bit, they go right back in the group on 10 shot stings @ 2450 fps. And the xcb boolit.
    How much more speed do you think is left for the rl15 powder?
    Not sure. A little maybe. I might need to drop to a little slower powder to gain too much more. Trying to not over do the alloy. But I don't know where this alloy fails.....
    The fear of the Lord is the beginning of knowledge: but fools despise wisdom and instruction.
    Proverbs 1:7

  8. #28
    Boolit Master waco's Avatar
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    I bought a pound of H414 to try out.
    The fear of the Lord is the beginning of knowledge: but fools despise wisdom and instruction.
    Proverbs 1:7

  9. #29
    Boolit Master 35 shooter's Avatar
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    Okay,thanks Waco. Good luck with the h414 too. That was a great powder for the 7/08 with jacketed, but i haven't tried it with cast in the .308.

  10. #30
    Boolit Master waco's Avatar
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    Me neither. It’s a new powder to me.
    The fear of the Lord is the beginning of knowledge: but fools despise wisdom and instruction.
    Proverbs 1:7

  11. #31
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    HangFireW8's Avatar
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    Windage is highly complex. See McCoy. Rinker's book formulas are useless. Forum discussions on windage tend to be at the latter level.
    I give loading advice based on my actual results in factory rifles with standard chambers, twist rates and basic accurizing.
    My goals for using cast boolits are lots of good, cheap, and reasonably accurate shooting, while avoiding overly tedious loading processes.
    The BHN Deformation Formula, and why I don't use it.
    How to find and fix sizing die eccentricity problems.
    Do you trust your casting thermometer?
    A few musings.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check