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PostPosted: Tue Aug 21, 2012 10:57 am 
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Bearcat

Joined: Sat Nov 21, 2009 2:14 pm
Posts: 23
Location: Beaumont, Texas 77707
Hello Folks,
I have a newly purchased HHI Magnaport-tuned SuperBlackHawk from 1982, that is giving me a light strike about twice in every 50 rounds. Sometimes I can send the dud round to the hammer a second time and get it to light off, but not often. The trigger on this one is nice and light, so I suspect a light Mainspring or one with coils cut off? If you agree, please advise a good spring to use, hopefully one that will not crank up the trigger pull too much :D
If it is something else, what might it be?
Thanks!
Amanda


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PostPosted: Tue Aug 21, 2012 9:02 pm 
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Buckeye
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Joined: Wed Apr 17, 2002 1:01 am
Posts: 1639
Location: Yuma,AZ
Factory ammo or handloads?

It should be a simple matter to remove the grip panels and look at the mainspring to see if it's been butchered. A factory replacement spring is cheap.

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PostPosted: Wed Aug 22, 2012 4:59 am 
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Bearcat

Joined: Sat Nov 21, 2009 2:14 pm
Posts: 23
Location: Beaumont, Texas 77707
Enigma,
Handloads or Factory, doesn't make any difference to the gun. It fires Federal-primed loads 100%, but I think they are softer primers anyway. My M29 sets them all off no problem. I don't mind using a Factory spring if needed, but if you folks know of a spring rate that normally works ok, yet is lighter than Factory, I would prefer to go that route. Rather like tuning a 1911 to run on a lighter-than-Factory spring, more than anything.
Thanks....Amanda


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PostPosted: Wed Aug 22, 2012 5:26 am 
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Bearcat

Joined: Tue Aug 02, 2011 4:03 pm
Posts: 39
Location: NH
I once had a GP-100 doing this upon return from a well-known but local gunsmith. It was probably a little worse with the WW primers and a lot worse with CCIs (which supposedly are about the hardest). Well, right away my handloads were blamed. I tried Federal and the problem largely went away but was not satisfied with either a one-trick-pony or a gun intended for serious work that would be some close to the edge. Before the smith would look at it he insisted I shoot an array of factory ammo. This is something I just do not do and the expense gave me a good bit of heartburn. Results? Same. He finally agreed to look at it. What did he do? He simply changed the mainspring in two minutes flat and handed it back to me. Problem solved after some frustration and a bunch of factory ammo burned up. Moral of the story? Don't waste much time on light strikes before bumping the spring tension.


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PostPosted: Wed Aug 22, 2012 8:42 am 
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Buckeye
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Joined: Wed Apr 17, 2002 1:01 am
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Location: Yuma,AZ
Wolf makes replacement mainsprings in both reduced power and extra power ratings. A lot of us refuse to use reduced power springs in order to elimninate the very problem that the OP is experiencing; we want our guns to go 'Bang!' every time we pull the trigger. Some go as far as to install extra power mainsprings - I believe that Flatgate is among them. FWIW, an Old Army mainspring has a heavier rating than a standard Blackhawk mainspring does, and is interchangeable.

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PostPosted: Wed Aug 22, 2012 8:49 am 
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Ruger Guru
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Location: Lake Lure NC USA
Get a set of different main springs from Wolff. Then, start with the lightest one, try it a bit, and if too light, go to the next heavier one until you get reliable ignition. Cheapest & easiest fix.

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PostPosted: Wed Aug 22, 2012 10:59 am 
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Bearcat

Joined: Sat Nov 21, 2009 2:14 pm
Posts: 23
Location: Beaumont, Texas 77707
Wolff has a set of varying weights coming. They seemed to offer the cheapest route to satisfaction :D
Thanks...Amanda


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PostPosted: Wed Aug 22, 2012 2:19 pm 
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Single-Sixer

Joined: Tue Jan 24, 2012 9:16 am
Posts: 464
Location: Republic of Texas
19 lb has worked 100% in ALL of my BH's, SBH's and Vaqueros... in any factory loads. At 18 lbs I see 1% to 2% failures to fire... In my experience the 19 lb. is the MINIMUM threshold for reliability... but that's just me.


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PostPosted: Wed Aug 22, 2012 5:23 pm 
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Bearcat

Joined: Sat Nov 21, 2009 2:14 pm
Posts: 23
Location: Beaumont, Texas 77707
redfoxx-
I should be ok then, since the springs will start at 19# and go to 26#. Thanks for the info.
Amanda


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PostPosted: Sat Sep 01, 2012 2:11 pm 
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Site Admin
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Joined: Mon Jun 18, 2001 1:01 am
Posts: 31600
Location: Star Valley, WY
As stated early in this thread, I am indeed a fan of strong mainsprings. The .357 Maximum calibre Blackhawk and Ruger's Percussion fired Old Army were fitted with stronger than other Ruger S.A.'s mainsprings. I've used those in a LOT of my shooters over the years and my guns have "creep free and relatively light" triggers. I don't like a real "touchy" trigger but one a bit lighter than "stock" is my choice.

JMHO,

flatgate


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PostPosted: Thu Sep 06, 2012 9:33 pm 
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Hawkeye
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Joined: Mon Sep 01, 2003 1:01 am
Posts: 8072
Location: Richmond Texas USA
Well Since I do a weeeeeee bit of CAS every gun I have has 15# springs in them. Except the ROAs they have 18# springs all are Wolfe. They all go bang every time. Stock spring is 19# and ROA is 22# I do believe
Loaded 1000s of rounds with Winchester primers which is all I use and yes they are the hardest.
Make sure the hammer isn't draging on the frame.
FWIW Cutting the spring is not the way to do it. Ya decrease the dia. of the wire coil. That is if ya want it to work everytime.
I have seen some fine tuned Vaqueros that felt about like a 10 12# spring.


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