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Thread: Cast bullet Max velocity



  1. #11
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    Thanks everyone for your input.
    My question was more to do with (possible) leading at higher velocities, above 1400FPS, and less to do with accuracy or hunting. IE no point in going for accuracy if leading is happening at 1500 FPS. Hunting is secondary at this point.
    Look twice, shoot once

  2. #12
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    Quote Originally Posted by longshotz View Post
    Good day everyone.
    Rifle is MG vintage 1978.
    Have decided to give cast bullets a go.
    What I know.
    - higher velocity (1400+) needs GC.
    - .460 seems to be the go-to size
    - BHN of 18+/-

    So what is the max velocity of a 300gr cast bullet without lead fouling?

    Thanks people
    Longshotz,

    General rules.

    Microgroove Barrel: Gas Checks and 1,500-1,600 fps max.
    Ballard Rifling: Gas Checks up to same velocity as jacketed & plain base bullets 1,700 fps.
    Alloy bullets need to be .001"-.002" over barrel groove diameter for best results.
    It is more about the pressure, bullet fit, and alloy hardness than the velocity.

    Straight and taper cartridges, plain base bullets work well. For bottle neck cartridges, gas checks work best. Again, pressure plays a large role in deposits.

    Attached is a link that includes cast reference materials you may find useful.

    https://www.marlinowners.com/forum/r...eferences.html

    One more item, if you have not checked out GT Bullets, you should. The alloy they use is perfect for hunting and with a GC will handle high velocity loads in the 45-70.

    Enjoy.
    Last edited by PoopDeckPappy; 05-25-2019 at 12:03 PM.
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  3. #13
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    Once again....FPS does not cause leading, poor fit and excess pressure does.

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  5. #14
    Sidewinder
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    I may be a little late on this, but I have been shooting my 1895-1995 CLtd a lot lately with cast. (MG barrel)
    At 75, I'm more about leisurely target shooting within 100Y these days & don't like to get beat up shooting 40-50 rds.
    I use a Lee 350 rnfppb bullet that is ACW/W with a little tin for a bhn-12, lubed with a softer BP lube that I make. I did Beagle the mold out to .459-.460".
    Also, I polished the barrel & get Zero leading for 50 shots- probably could easily go 100 or more & cleaning is two wet patches & two dry.
    I'm only loading 10-11 of Unique @ apx. 1050 fps, but it gives me 1 moa @100Y with a Williams peep.
    I have pushed water quenched b-18 same boolits at 1500 with no leading too, but like shooting the lighter load much better!
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  6. #15
    Deadeye
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    "no point in going for accuracy if leading is happening"

    bingo!

    if accuracy is your goal - who gives a whit how fast the slug is going?

  7. #16
    Sidewinder
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    Quote Originally Posted by bryan alder View Post
    Ive pushed my own cast bullets to 2600 fps so far. Others chasing speed have gone above 3000. Bullet fit and lube are most important. Of course with cast you don't need all that speed for hunting especially with the 45-70
    I'm fond of shooting Cast Performance 405s around 1200 to 1600 fps.
    Nothing wrong with trying some faster loads with Gas Checks.
    The 405s at 1600 fps are pretty much poison on anything in the lower 48.
    If I felt the need to hunt Alaska I wouldn't feel under gunned with my Guide Gun
    and a bunch of 405s loaded to near 1600 fps.
    That's not the rifle or load I'd chose for long range... BUT...
    When It's eat or be eaten distance, I'd want my Marlin Guide Gun.

  8. #17
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    Quote Originally Posted by Ole Man Dan View Post
    I'm fond of shooting Cast Performance 405s around 1200 to 1600 fps.
    Nothing wrong with trying some faster loads with Gas Checks.
    The 405s at 1600 fps are pretty much poison on anything in the lower 48.
    If I felt the need to hunt Alaska I wouldn't feel under gunned with my Guide Gun
    and a bunch of 405s loaded to near 1600 fps.
    That's not the rifle or load I'd chose for long range... BUT...
    When It's eat or be eaten distance, I'd want my Marlin Guide Gun.
    Yeah I'm shooting a 435 grain in my XLR at about 1700 fps. Probably my most used gun
    Last edited by bryan alder; 06-01-2019 at 10:27 AM.
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  9. #18
    Tinhorn
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    Oh my gosh, super ouch!

  10. #19
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    Quote Originally Posted by gumbo333 View Post
    Oh my gosh, super ouch!
    Thanks for the heads up. Typo fixed!
    Necessity is the plea for every infringement of human freedom. It is the argument of tyrants; it is the creed of slaves.” — William Pitt (the Younger), Speech in the House of Commons, November 18, 1783

  11. #20
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    Longshotz,

    It depends -----------------


    On alloy, on lube, on bore condition, on bullet to bore fit, gas check or not, and a whole bunch of other considerations.

    I have shot my RUGER #1 - 45/70 a lot at velocities of over 2000fps, as high as 2500fps and hunted the first 45/70 season at 2300fps with a 355gr Wide Flat Nose cast.

    Alloy was nothing exotic, just plain old clip on wheel weights with possibly a VERY SLIGHT touch of tin.

    I DO NOT feel that I have a leading issue/problem unless there is a build up of lead in the bore. A light wash of lead in the last couple inches of the bore is a NON ISSUE!!!!!!!!!!!

    To my way of thinking that is NOT LEADING!, unless that "wash" continues to build up in thickness. It has not!

    So, the problem with this load was not anything close to leading, but the devastation it caused at that velocity! That first critter left me wondering just what in the world I'd turned loose on the game population! Huge hole, no minced bone or tissue, just about a 4" void with the bone and tissue GONE! Apparently blown out of the relatively small exit hole.

    A Wide Flat Nose case bullet is highly effective. You do not need to desire or plan for expansion and you don't need warp velocity.

    My 465gr WFN cast of 50/50 clip on wheel weights/lead and water quenched, with a 1650fps velocity flat gets er done, providing of course there is proper bullet placement.

    Deer typically drop where they stood, and elk are down in less time then it takes to tell about it.

    But then, I took two deer in the 2017 season with a 275gr WFN cast from a .44 rifle. 1750fps and both dead where they stood.

    Crusty Deary Ol'Coot
    Frank V likes this.


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