Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

Latest topics

» Nut from a pool que ball?
by drawknife Sun Jun 17, 2018 5:29 am

» my composite crossbow lath project
by stuckinthemud1 Fri Jun 15, 2018 6:07 am

» Trouble with my Gafa
by drawknife Fri Jun 15, 2018 2:56 am

» Do all triggers Have claws - what types and claw or no claw
by globalmark Thu Jun 14, 2018 12:19 am

» For Sale: Masai Crossbow
by TonyU Mon Jun 11, 2018 1:15 pm

» Medieval composite bows
by juanjo Fri Jun 08, 2018 5:10 am

» yew and sinew prod help needed
by stuckinthemud1 Thu Jun 07, 2018 1:34 am

» Small gothic crossbow (with wooden lever)
by OrienM Fri Jun 01, 2018 10:35 am

» Binding on the stirrup
by Geezer Sat May 26, 2018 7:26 am

» horn inlay and veneer
by OrienM Thu May 24, 2018 8:44 pm

» Presentation
by c sitas Wed May 23, 2018 4:31 pm

» My latest crossbow
by drawknife Tue May 22, 2018 3:13 pm

» The Arbalist Guild - Around the World
by stuckinthemud1 Sun May 20, 2018 5:32 am

» angles and rivets
by Geezer Fri May 18, 2018 1:16 pm

» morticed nut blocks
by Dark Factor Wed May 16, 2018 12:02 pm

» Crossbow triggers
by Croftage Mon May 14, 2018 1:41 pm

» Cocking lever
by c sitas Fri May 11, 2018 8:09 am

» Late roman crossbow
by Dark Factor Wed May 09, 2018 10:27 am

» Powermaster Madness
by Archer46176 Sun May 06, 2018 8:08 pm

» Fast loading crossbow
by septua Mon Apr 23, 2018 9:22 am

» lashing a glass prod in raw hide?
by kenh Sun Apr 22, 2018 7:00 am

» Balestra Veloce / Leonardo DaVinci
by msalazar2310 Fri Apr 20, 2018 10:37 am

» Goats Foot Lever
by Geezer Wed Apr 18, 2018 12:42 pm

» Hickory and Ipe 180lb flatbow
by actionbow Mon Apr 16, 2018 1:56 pm

» goat foot questions.
by Geezer Sat Apr 14, 2018 10:26 am


    first fire and deviations. HELP!!

    Share
    avatar
    ferdinand
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 301
    Join date : 2012-04-24

    first fire and deviations. HELP!!

    Post by ferdinand on Sun Apr 29, 2012 11:00 am

    I need ur help guys.
    After a few shots i made a nice group of arrows but i have a problem.
    Elevation is fine, but my arrows go left!
    I tried shifting the prod left and right but cant really make out any difference in direction of the shots.
    In theory one side should be stronger, but does it mean that the right hand part of the prod makes the shots go left when it is stronger? ore vice versa?
    Anyone know the theory behind these deviations?

    Thanks in advance.
    avatar
    mac
    Master Weaponsmith
    Master Weaponsmith

    Posts : 560
    Join date : 2010-12-23
    Location : Near Philly USA

    Re: first fire and deviations. HELP!!

    Post by mac on Sun Apr 29, 2012 1:18 pm

    Firdi,

    There are a couple of things that come to my mind.

    First....Are you sure that you are drawing the string back evenly? Put a mark on the string and , make sure that the mark ends up between the fingers of the nut. If the string is not centered, the bolts will leave the bow crooked, and will tend to veer off in the direction they are pointed.

    Second... Make sure that the limbs of the bow are level when you shoot. If the bow is tipped to the left, the bolts will go to the left.

    Mac
    avatar
    ferdinand
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 301
    Join date : 2012-04-24

    Re: first fire and deviations. HELP!!

    Post by ferdinand on Mon Apr 30, 2012 3:00 am

    Thanks Mac!
    I'll have a try at what u said.
    avatar
    stoneagebowyer
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 490
    Join date : 2011-01-12

    Re: first fire and deviations. HELP!!

    Post by stoneagebowyer on Mon Apr 30, 2012 9:54 am

    Also, make sure your quarrel groove or rest is centered.
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 1018
    Join date : 2010-01-12
    Age : 70
    Location : Austin, Texas, USA

    Re: first fire and deviations. HELP!!

    Post by Geezer on Mon Apr 30, 2012 12:29 pm

    All those are good possibilities, but in my experience... making and selling hundreds of crossbows, the most common fault for right-handed shooters lies in rocking the bow to the left to get the eye in line with the groove... it's a bit challenging with a straight stock. I always have the customer check that he's holding the bow absolutely level before anything else.
    Geezer/
    avatar
    stoneagebowyer
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 490
    Join date : 2011-01-12

    Re: first fire and deviations. HELP!!

    Post by stoneagebowyer on Mon Apr 30, 2012 1:15 pm

    David Watson knows what he is talking about.

    I would highly suggest that when you start shooting a new bow, use a bench rest to eliminate that variable. Just a folding table with a few sandbags to rest the crossbow stock on would do the trick, if you don't have access to a formal shooting range. Sighting in is much easier that way.

    Dane
    avatar
    ferdinand
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 301
    Join date : 2012-04-24

    Re: first fire and deviations. HELP!!

    Post by ferdinand on Mon Apr 30, 2012 9:20 pm

    Thanks for all the advice!
    I had a litlle weapons training and Geezers remarks sound really plausible!
    Measuring the prod vs stock i found a flaw, the prod seems to point to the right instead of being at a 90' angle if u look at it from above.
    Anyone follow me? (just a dutch guy trying his best).
    Its like a crooked cross(just slightly)
    And also it tilts to the left looking down the stock.
    The way my prod is mounted is no standerd way so i must do some thinking how to permanently fix my problems.
    Anny suggestions are always welcome.
    avatar
    stoneagebowyer
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 490
    Join date : 2011-01-12

    Re: first fire and deviations. HELP!!

    Post by stoneagebowyer on Tue May 01, 2012 5:41 am

    Your English is great, so don't feel bad. Based on your using the stirrup as part of how you lock the prod into the stock, maybe remove the bow and prod, use files or raps to true up the prod socket hole so the prod is 90 degrees as you look down, then use slim wedges or shims made out of hardwood or thin metal, and bolt the stirrup back into place? Others may have ideas to fix the problem.
    avatar
    ferdinand
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 301
    Join date : 2012-04-24

    Re: first fire and deviations. HELP!!

    Post by ferdinand on Tue May 01, 2012 11:36 am

    Great advice.
    Although i have one problem, the stirrup is rivetted so cant take it off easy.
    But the wedges are great idea.
    I was looking for that word "wedge". I thought the word whas "key".
    Anyhow, here is a picture of one of the two i forged.
    avatar
    ferdinand
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 301
    Join date : 2012-04-24

    Re: first fire and deviations. HELP!!

    Post by ferdinand on Tue May 01, 2012 11:45 am

    This is how i put them in, one each side to be able to adjust.
    No time to fire it, couple of nightshifts now.
    I'll get back to you guys on how it worked out.
    avatar
    ferdinand
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 301
    Join date : 2012-04-24

    Re: first fire and deviations. HELP!!

    Post by ferdinand on Tue May 01, 2012 11:49 am

    Extra advantage, the prod is higher now wich is good because the string whas resting kind off heavy on the stock.
    Lesser friction means better shot right?!
    Testing in couple of days.
    Thanks alot guys!

    Sponsored content

    Re: first fire and deviations. HELP!!

    Post by Sponsored content


      Current date/time is Sat Jun 23, 2018 9:51 am