Got a front sight on my Cinderblock

Discussion in 'Rifle' started by spamassassin, Jan 7, 2017.

  1. spamassassin Well-Known Member

    Member Since:
    Aug 8, 2014
    Message Count:
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    One of my rifles is a custom Swedish Mauser that I converted to .45cal. It's got a 18" .452 bore pipe on it with a .45ACP chamber. Using .460 Rowland brass cut to .888" I can make some seriously snot rockety loads. The bolt is factory bent and it's got a Timney trigger on it with a Williams rear peep sight. I had originally put the front sight from a Swede carbine on it but that decided to join the going downrange club one day and besides never fit right in the first place. My coach brought me some old take-off military front and rear sights and I found one that not only swage fit the barrel really well but is also tall enough to do the job. This rifle is a punkin' slinger of the highest order. BC on .452" 230gn bullets is not far above zero.

    Last weekend I had taken it with some assorted loads of wildly differing power levels and was hitting 200m chicken silhouettes pretty well. Well enough that I'm sure I can take it pig hunting and be able to swat something out to 200m but also that's light and handy and puts the stomp down. With my top end loads I'm getting just over 2000fps with 200gn pills. That's AR-15 power levels. Bullet selection is a pain but nosler custom comps at 185gn seem to hold up really well as do a few of Bear Creek's hard cast moly coated lead pills.

    Yep, that's a 1911 mag sticking out. The barrel sticking through the trigger guard is a .458" for a different project.

    The cartridge I call .45Cinderblock in its full house loading. It'll eat .45ACP and .45Super too. I run my peak pressures really high. Flat primers are the rule. With .45acp cases I get 2 firings at full peak power before the primer pockets loosen up. With Rowland brass I don't really have loose primer problems so far after up to 10 loadings.

    The first set of loads I pulled out and shot last weekend were pretty loud compared to normal .45acp and were clearly loaded in .45acp mililtary brass so my coach notices, looks closer at and says, "What the hell is in those?" So I look at the box, read and reply, "Box says 9grains of Unique in this row and 12 in this row with 200 grain hollow base round nose Bear Creek moly coated lead." And he, a seasoned handloader of .45acp, quietly steps back about 10 feet while I shoot the rest of them. He seemed surprised that I hadn't had a KB on a case head letting go. Then I pulled out and shot a few of the full house loads. They're much louder with a lot more recoil. He was additionally surprised.

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    Will I tell you my load data for the stout stuff? Not publicly but by PM sure.
    wood chucker likes this.
  2. boostless Active Member

    Member Since:
    May 5, 2014
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    Looks good, I'd like to shoot something like that. I've got an AR15 in 9mm and it's a blast to shoot.
  3. Marneaus Moderator

    Member Since:
    Jul 31, 2013
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    This is an incredibly awesome item you have put together.

    Not really feeling the forend cut but the firearm and the load data you are providing is freaking cool
  4. spamassassin Well-Known Member

    Member Since:
    Aug 8, 2014
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    Coach came over last night with an idea to use a heavy wide flat nose super hard cast slug with a gas check and another for a .45cal sabot with a 180gn flat nose .357 bullet in it. He's got the mold laying around for both bullets. He's thinking we'll be able to get up around 2200fps with the sabot round. I'm not so sure but, what the heck might as well try. The heavy should end up at ~290 grains. Also have to work on some loads with Lehigh defender solids and see what I can pull from those. I think a 120gn Extreme Defense could be pushed around 2300-2400fps without resorting to a primer pocket loosening load. For a 0-200m pig killer it'd be pretty sweet. Should make a hole you could drop a mason jar through all the way through a 125lbs swine.
  5. wood chucker Moderator

    Member Since:
    Dec 19, 2012
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    With cut down reamed out .308 cases you can jack the pressures up to :eek: :cool: levels. But you already know that :D
  6. spamassassin Well-Known Member

    Member Since:
    Aug 8, 2014
    Message Count:
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    Tried it in the beginning. It was just too much effort and the tiniest mistake meant 20 minutes work down the drain. I said screw that and found .45super and .460 rowland. .45super runs about 28K psi, .45acp at 21K. .460 rowland are super strong compared to either, basically the same thing as you'd get hogging out .308 cases to the same internal dimensions as .45acp. .460 runs around double .45acp pressures in pistols at 45K psi. I'm running it above that by a long way, like 20% or more above book max powder charges with slow powders. A lot of them fill the case near or all the way to the mouth and are severely compressed. Totally unsafe to use in a pistol.

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