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625 Mountain Gun Loads?

Discussion in 'Handloading and Reloading' started by wlewisiii, Oct 4, 2012.

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  1. wlewisiii

    wlewisiii Member

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    Put a 625-9 .45 Colt Mountain Gun on layaway today.

    I've got some 250 & 240 grain Keith type LSWC & Unique. Anyone got a favorite recipe for this pistol?

    Thanks!
     
  2. joed

    joed Member

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    I used to shoot 8.5 gr of Unique with a 255 gr LSWC out of mine. Ended up selling mine after 2 years, I hope yours shows better accuracy.
     
  3. rcmodel

    rcmodel Member in memoriam

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    8.5 to 9.0 grains Unique with either bullet has been the standard .45 Colt load for longer then I am old.

    rc
     
  4. CraigC
    • Contributing Member

    CraigC Member

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    Usually 9.0gr Unique, like a broken record. ;)
     
  5. USSR

    USSR Member

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    Like CraigC, I'm partial to 9.0gr of Unique.

    Don
     
  6. wlewisiii

    wlewisiii Member

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    Yep. Since I picked it up, I've put a bunch of Unique through it 9.0 grains at a time. It's a fun load for a day of shooting. Really sweet through the mountain gun.

    Thanks!
     
    Last edited: Nov 8, 2012
  7. gwalchmai

    gwalchmai Member

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    5.5gr of Solo-1000 under a 250gr LSWC for a nice light plinking load.
     
  8. Float Pilot

    Float Pilot Member

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    Back when I started Law Dawging, I carried a M-25-5 4 inch (45 Colt) for the first few years.
    I used to use 10.3 grains of Unique, a mag primer and the old Speer 200 grain jacketed hollow points. The ones they used to call the Flying Ash-tray. It worked well in the 4 inch barrel. I had to shoot several large rabid dogs during one winter in a bush village.
    That round was much more effective than the factory silver-tip loads. I carried it for 3 years or so until a District Attorney had a cow ...
     
  9. Slamfire

    Slamfire Member

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    I have shot hundreds, if not thousands of pounds of 250 LRN, LSWC with 8.5 grains Unique. That usually gave me about 850 to 900 fps depending on the conditions.

    Now I have turned into an old futz and am shooting 8.0 grains Unique and that chronographs exactly at 800 fps. Back in 1993 I purchased a lot of Unique powder, and most of my data reflects that older version. I did go out and shoot the new stuff and it appears to be faster. I would start with 7.5 grains and work my way up with that stuff.

    I am frustrated with the inconsistency I get with Accurate Arms powders. I developed a load in a SAA with 10.5. grs AA#5 and it shot great and was about 825-850 fps. Well, with this different lot of AA#5, 10.5 grs is faster than I want. I don’t want 875 fps, so I am going to retest, and I expect 9.5 grs will give me what I want.

    AA#5 is a ball powder, shoots “cleaner” than Unique, though that does not make the slightest difference on paper or in clean up time.

    I though might be of interest is the Wolf primer data. Looks to be a mild primer.

    My loads are accurate enough to hit my 12 gong target each shot, standing, shooting one handed, at 50 yards. I don’t always hit each shot. I am very happy if I hit 5/6. The distance is within the range limitations of where I shoot.


    The 2400 load is the most powerful I have shot in my 45LC, accurate, powerful, uncomfortable. I don't recommend high doses of it, and I guess this would be the most powerful load you could shoot in the N frame.
    Code:
    [SIZE="3"]
    
    [B]M625-9 Mountain Gun 4" Barrel [/B]
    
    
    250 JHP 8.5 grs Unique thrown, W-W cases, WLP primers 
    18-Mar-07 T = 55 °F V, accurate 
    Ave Vel = 830 
    Std Dev = 30 
    ES= 103.5 
    High= 893.4 
    Low= 789.8 
    Number Shots= 12 
    
    
    250 Nosler JHP 17.5 grs 2400 thrown, Master cases, Fed150 primers 
    18-Mar-07 T = 55 °F V, accurate uncomfortable recoil 
    Ave Vel = 971 
    Std Dev = 25 
    ES= 69.47 
    High= 1003 
    Low= 933.5 
    Number Shots= 11 
    
    
    255 LSWC (.452") 8.0 grs Unique thrown, lot 6/21/1993Starline cases, WLP primers 
    25-Mar-07 T = 80 °F accurate 
    Ave Vel = 800 
    Std Dev = 30 
    ES 99.02 
    High 847.2 
    Low 748.1 
    Number Shots 11 
    
    
    250 LRN (.452") Valiant 8.0 grs Unique lot 6/21/1993 thrown, R-P cases, WLP primers
    25-Mar 07 T = 80°F accurate 
    Ave Vel = 814 
    Std Dev = 24 
    ES 72.81 
    High 847 
    Low 774.2 
    Number Shots 11 
    
    
    250 LRN (.454") Valiant 8.5 grs Unique thrown lot 5471, 4/3/06, R-P cases, WLP primers
    
    25-Mar-07 T = 80 °F accurate 
    Ave Vel = 891 
    Std Dev = 17 
    ES 61.31 
    High 921.1 
    Low 859.8 
    Number Shots 27 
    
    255 LSWC (.452") 8.0 grs Unique lot 6/21/1993 mixed cases WLP (nickel) 
    
    23-Sep-07 T = 82 °F 
    
    Ave Vel = 802.5 
    Std Dev = 31.03 
    ES = 123.5 
    High = 867.2 
    Low = 743.6 
    N = 12 
    
    250 LSWC (.452") 10.5 grs AA#5 lot 12599 mixed cases WLP (nickel) 
    
    23-Sep-07 T = 82 °F 
    
    Ave Vel = 875.1 
    Std Dev = 19.36 
    ES = 62.64 
    High = 905.7 
    Low = 843 
    N = 12 
    
    
    250 LSWC (.452") 10.5 grs AA#5 lot 12599 mixed cases Wolf NCLP 
    
    23-Sep-07 T = 82 °F 
    
    Ave Vel = 826.2 
    Std Dev = 20.14 
    ES = 63.38 
    High = 862.1 
    Low = 798.7 
    N = 12
    
    
    [ATTACH=full]641177[/ATTACH][/SIZE]
     
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