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  #1  
Old 09-10-2008, 07:42 PM
davemustaine

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Biathlon Basic trigger adustment.



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Can it be done and how do I do it? I've got the trigger group off, but I can't get the sliding safety bar off. The pull weight is fine, but there is alot of take up.

Last edited by aom22; 09-11-2008 at 11:13 AM. Reason: Restore Original Title
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  #2  
Old 09-10-2008, 09:19 PM
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Biathlon Basic trigger adustment.
Can it be done and how do I do it?

Yes the trigger pull weight can be adjusted heavier or lighter.

If you have the trigger group out you have to unhook spring #1
then you have to turn the bottom spring eye in to make the trigger pull
lighter, if you turn the eye out the trigger pull will be heavier.
Its all about spring tension Or friction. The fun part is hooking the spring
back up.

The pull weight is fine, but there is allot of take up.

True because its a two stage trigger. The 1st stage is the take up.
If you want to take away the 1st stag you have to drill the trigger bridge
& install a set screw 4-40 or 6-32.


Thats how I adjust the trigger on my BB.

Swiss

Last edited by midwest swiss; 10-07-2010 at 08:11 PM.
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Old 09-10-2008, 09:31 PM
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Trigger over travel adjustment.

Here I will post a few pictures & it will do a good job.
http://i28.photobucket.com/albums/c2...2/100_1250.jpg
http://i28.photobucket.com/albums/c2...2/100_1255.jpg
http://i28.photobucket.com/albums/c2...2/100_1258.jpg
http://i28.photobucket.com/albums/c2...2/100_1273.jpg
There thats all my trigger tricks I have done to my BB.
Here is also a nice read.
https://www.rimfirecentral.com/forums...d.php?t=140660

Swiss

Last edited by midwest swiss; 10-07-2010 at 08:15 PM.
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Old 09-10-2008, 10:02 PM
Geoffrey
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I basically did what Swiss did and it is now at 10oz. It could be made to go lower but, you would probably need to go with a lighter spring which would be a good idea anyway. With a lighter spring you could set it where the spring was pre-stretched more before raising the pull weight too much.

I found drilling and tapping to be somewhat difficult because of the hardness of the metal. I chipped my tap in the process but, was able to finish the job by regrinding the tap. I removed the trigger group to do the work and had some difficulty with the pins. If yours are as tight as mine, a good set of pin punches will be handy.

I understand that some of the BB s came with an adjustable trigger.
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Old 09-10-2008, 10:56 PM
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I just checked the trigger pull on my BB & its at 1lb10Oz.
I like the two stage trigger for hunting, it makes a safe trigger set up
under 2lbs. I am still amazed at the trigger on the BB, for a
$300-$400 rifle.
As far as I know you have to jump up to a Biathlon 7-3 or 7-4
rifle for the full boat adjustable trigger.

Last edited by midwest swiss; 09-10-2008 at 10:59 PM.
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Old 09-10-2008, 11:39 PM
Geoffrey
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I have read that some folks got lucky and their BB came with the adjustable trigger. Most people thought that the factory ran out of the regular BB trigger and substituted the 7-3 or 7-4 trigger for expediency. Unfortunately, neither of mine came that way.

I should have mentioned that I don't recommend a very light trigger for hunting. If I were take my BB hunting, I would adjust the pull weight up to a safe weight. For now, I just shoot targets with it. They do make a great squirrel gun.

Last edited by Geoffrey; 09-10-2008 at 11:43 PM.
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Old 09-11-2008, 07:16 AM
Kevin6q

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Just curious; why do people think a heavier trigger is safer for hunting?
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Old 09-11-2008, 08:50 AM
davemustaine

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Thanks. I decided to leave it the way it is for now. It is quite good as is.
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Old 09-11-2008, 09:00 AM
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Quote:
Originally Posted by Kevin6q View Post
Just curious; why do people think a heavier trigger is safer for hunting?
When your in a full boat official Biathlon race are you guys & girls allowed
to have a loaded firearm when you all are doing the cross-country
skiing portion of the race. ???? If ya can't why not.

Swiss

Last edited by midwest swiss; 09-11-2008 at 09:04 AM.
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Old 09-11-2008, 11:24 AM
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Quote:
Originally Posted by midwest swiss View Post
When your in a full boat official Biathlon race are you guys & girls allowed
to have a loaded firearm when you all are doing the cross-country
skiing portion of the race. ???? If ya can't why not.
I'm not a biathlon racer (nor did I stay in a Holiday Inn last night), but from what I've seen, they ski up to the shooting station and then take a magazine out of their stock-mounted magazine holder and put it in the rifle. I guess it's just that extra margin of safety to not ski with a loaded firearm on their back, although I wouldn't see it as particularly dangerous unless it were cocked with one in the chamber. In any case, I don't think there would be any advantage in having the mag in the rifle while they ski, since they usually pause for a couple of seconds anyway to get their heart rate to calm down a bit before they shoot.
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Old 09-11-2008, 12:54 PM
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My BB has a nice trigger just as it came from the box so I've not fooled with it at all.

I actually prefer the two-stage trigger, having shot a lot of various military arms over the years.

Triggers adjusted for match use are generally very light. Using such a trigger in the field increases the chances of an accidental discharge. For hunting, a 2-3# trigger makes an AD less likely. Some people are safe with light triggers while others aren't safe with ANY trigger!
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Old 09-11-2008, 12:54 PM
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extra margin of safety

I like that ......toivo

Midwest Swiss
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Old 09-11-2008, 01:01 PM
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I also agree with doubs43 100%

All I know, if I was party hunting with a bunch of folks I would
be a bit uncomfortable if my buddy that is walking in back of me
in the woods with a loaded rifle be it .22Lr or a 30.06 that has an 8oz hair trigger.
It only takes one oops.

Swiss

Last edited by midwest swiss; 09-11-2008 at 02:19 PM.
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Old 09-11-2008, 05:17 PM
Kevin6q

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More or less what I thought

I understand the reduction of accidental discharge. I never went hunting w/ a round in the chamber. I always targeted the quarry, loaded a round (cycled the bolt) and fired. The idea of a 5 ton trigger and a round in the chamber would make me nervous. The trigger weight doesn't mean anything of there's not round in the chamber or the bolt's open.

In biathlon the loaded mags are kept of the rifle. Entering the shooting point the empty mag is swapped out, shoot 5 rounds and sling the rifle to your back and head off to ski. The just fired mag is left in to keep snow out of the action in case of a crash. In theory (this is why they are called accidents) even if the mag is hot there should be no live round in the chamber. The minimum trigger pull is 500grams (1.1 lb.). Before the race, trigger weights are checked and if its too light you have to adjust it heavier. Once the rifle is checked it is impounded in the pre-race area. If you remove the rifle it must be re-teched. During the race, if the athlete doesn't fire 5 rounds they are DQ'd on the spot. After crossing the finish line there are race officials who open the bolt of the rifle while its still on the athlete. Cross the line, hang on the poles, try not to puke and someone is yanking on the bolt.

Skiing w/ a chambered round has the great potential for killing someone. Most likely the person skiing w/ the rifle. In most crashes, the fore end of the stock pops the athlete in the back of the head or the muzzle gets you. To the best of my knowledge, no one has ever been killed at a winter race. There has been a fatality at a summer event.

During the summer, rifles are left on a rack w/ bolts open. The athlete enters the range area, grabs the rifle by the barrel and carries it muzzle up w/ one hand. After arriving at the point the mags are swapped out, shoot, open the bolt and carry the rifle back to the rack. Moving a rifle w/ a closed bolt is an immediate DQ and potential to get booted out of the rest of the event. Some summer events require chamber flags, some don't.
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