625 Mountain Gun Loads?


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wlewisiii
October 5, 2012, 12:28 AM
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!

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joed
October 5, 2012, 07:29 AM
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.

rcmodel
October 5, 2012, 01:21 PM
8.5 to 9.0 grains Unique with either bullet has been the standard .45 Colt load for longer then I am old.

rc

CraigC
October 5, 2012, 01:26 PM
Usually 9.0gr Unique, like a broken record. ;)

USSR
October 5, 2012, 02:45 PM
Like CraigC, I'm partial to 9.0gr of Unique.

Don

wlewisiii
November 8, 2012, 10:59 AM
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!

gwalchmai
November 8, 2012, 01:42 PM
5.5gr of Solo-1000 under a 250gr LSWC for a nice light plinking load.

Float Pilot
November 8, 2012, 07:17 PM
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 ...

SlamFire1
November 8, 2012, 10:41 PM
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 dont 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 dont 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.


M625-9 Mountain Gun 4" Barrel


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 = 80F 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


http://img.photobucket.com/albums/v479/SlamFire/Smith%20and%20Wesson%20Pistols/M62545LCReduced.jpg

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