Lowering POI on a shotgun at its limits of adjustment

Discussion in 'Trapshooting Forum - Americantrapshooter.com' started by 635 G, Jun 15, 2020.

  1. 635 G

    635 G Mega Poster

    I got a Devault 391, Elite conversion- with the rib all the way up and the comb bottomed out its shooting 70/30

    the rib is 7/8" in the front & 3/8" in the front--if I lower it all the way the gun shoots 100%

    Would like together the gun to shoot totally flat 50/50 for sporting clays

    Looking for suggestions--
     
  2. Ron Burdick

    Ron Burdick Well-Known Member Founding Member

    Time to bend the barrel.

    Ron Burdick
     
  3. ljutic329

    ljutic329 Mega Poster Founding Member

    Sell it and buy a bolt action JC Higgins.
     
  4. 635 G

    635 G Mega Poster

    Thanx for the help guys-looks like I'll buy a sporting 391-
     
  5. cooter

    cooter Member

    If the gun has screw in chokes , you can get a tube to shoot where you want it , It will be a dedicated tube just for that gun . wrights did one for me and it cured the problem . Hope that helps .
     
  6. trapshooter47

    trapshooter47 US Army Retired US Army Retired Founding Member

    If you like the Beretta and want an adjustable rib get the A400 multi target. I’ve got one listed on here For Sale. I had a Devault 391 conversion and this gun is close to that as far as a factory semi auto.
     
  7. 635 G

    635 G Mega Poster

    Will be calling Briley today, for one of their EXcentrix chokes
     
    History Seeker likes this.
  8. Semperfi909

    Semperfi909 Mega Poster

    Might be cheaper and easier just to shave the top of the comb. I mean you're prolly looking at less than 1/8" and how big a deal is that?

    just a thot
     
  9. cwtech

    cwtech Active Member

    If you don't want to alter your existing comb, have a thinner comb made for when shooting sporting clays. ....Switch the comb back when shooting trap.
     
    Storeman and rbdjr like this.
  10. 635 G

    635 G Mega Poster

    I'm sticking with this 391, has a release trigger & I have a complete receiver with a release in it, just in case something craps out
     
  11. nickthanos

    nickthanos Well-Known Member

    The rib adjustment does not lower you point of impact!!! The comb does. If it is an adjustable comb, you can take the comb off & sand some off the bottom of the comb with a belt sander. Then seal it with Birchwood Casey stock oil. If you only need to take a 16 of an inch or so off, don't even worry about sanding the bottom with the metal adjustment plate on. Don't sand into the screw heads. Your eye is the rear site. The rib adjustment is only for your site picture. You have to move the comb in the direction you need the point of impact to go. I have done it to several guns I work on with excellent results. Get the impact right, and then move the rib for your figure eight picture. Easy fix, unless you need a lot off the bottom of the comb, then you will have to take the hardware out & trim the wood out to properly reset the hardware.
     
    rbdjr and firewater like this.
  12. Semperfi909

    Semperfi909 Mega Poster

    If the front bead is vertically adjustable then moving it does change the POI if you shoot off the bead. Moving the bead is just like moving the comb but in the opposite direction. Simple geometry. Tilting the rib one way or another does change the view but does not change the POI unless the front bead moves relative to the bore as a result.
     
    Jon Reitz likes this.
  13. rrisum

    rrisum Mega Poster

    If my memory is correct - or check it out on Rolin Oswalts stock fitters bible -1/8 inch raise on the front bead, on a 3/4 ' barrel will lower you POI 3" -You will have to check it out - this is what I have done to several hunting guns to lower their POI - Works good - held on with two sided auto tape IMG_0570.JPG
     
    cl3 and Storeman like this.
  14. 635 G

    635 G Mega Poster

    Thanx guys-When Dennis made my guns for me, he told me the rib adjustment from top to bottom would be 70%-100%, without moving the comb--and what about those Krieghoff ACS's with an adj rib-think they do a little more than the sight picture
     
  15. 635 G

    635 G Mega Poster

    The bottom end ,the gun shoots 80/20--everything else goes higher

    Briley will make an Excentrix choke & it will shoot 55/45--now the Big ?--its only $125.00/per choke

    If you were going to shoot sporting, 5-stand & crazy quail
    and wanted just one choke what constriction would be close to a fits-all
     
    Storeman likes this.
  16. trapshooter47

    trapshooter47 US Army Retired US Army Retired Founding Member

    My thoughts are why try to turn a dedicated trap gun into a sporting clays gun. I’ve owned several of Devaults Conversions and the only one that would lend itself to sporting would be the Kemens he did. Even at that you would need the flattest rib he made.
     
  17. 635 G

    635 G Mega Poster

    I'm 77, got 3 dedicated trap guns-just trying sporting clays for s--ts & giggles--do not want to buy a dedicated sporting gun--really don't care for the sport-but its something to do and its 15 minutes away

    Got 3 DeVault guns all made for me ,an Infinity, 682 Gold E & a 391 Elite conversion--never could shoot the 682
     
  18. trapshooter47

    trapshooter47 US Army Retired US Army Retired Founding Member

    I’ve stayed away from sporting because I’m afraid I’d like it. Ive had 2 Kemens Dennis converted and wish I’d kept them. Dean Deboe has a Mach One I’d like to have but he is keeping it. I borrow it from time to time. Dennis knew what he was doing.
    I’ve had one of Briley eccentric chokes, they work, I just didn’t trust that it would index correctly.
     
  19. 635 G

    635 G Mega Poster

    I've see some Kemens that Dennis worked , they appeared to be beautiful guns
     
  20. 635 G

    635 G Mega Poster

    Plan B, since I have a complete spare receiver, with a good trigger, bolt release--I've decided to get a 28" sporting barrel (new) and a used sporting stock and not have to worry about sending my DeVault barrel via Fedex,eta DeVault barrel is not replaceable if s--t happens
     
    Storeman likes this.
  21. rrisum

    rrisum Mega Poster

    shot a browning BT99 golden clay yesterday -- I have the same question? Why would anyone build a gun with a adjustable comb that starts out at 80/20? -- Was it just that gun? or is there a market for a guns that can be adjusted up to three foot high? Great looking gun just can't live with that high a shooter to start with and no adjustment down-
     
  22. 635 G

    635 G Mega Poster

    My Trap guns all shoot above 80/20--I'm now talking about a sporting gun-if you are shooting @ a rising target why would anyone want a gun whose shot pattern was under the target
     
  23. Daryl Shehan

    Daryl Shehan Active Member

    Many targets in sporting clays are dropping at the break point. Most misses in sporting are over or behind, so I sure don't want a 80/20 gun.
     
  24. 635 G

    635 G Mega Poster

    Thats why I'm going to plan B, waiting on the new barrel & furniture
     
    Storeman likes this.
  25. nickthanos

    nickthanos Well-Known Member

    Just did a customer Krieghoff that was shooting too high for him. Took the comb off & sanded the bottom so it would sit lower. Sanded just to the screw heads. Came back & needed it lower still. Took the comb off & took the hardware mounting screws out & drilled the holes a little deeper to counter sink them a bit & put screws back in. Had to sand a little off the front & back of the comb so it would drop all the way down. Looked real good. He was happy. He texted me back two days later & told me he won the AA singles with 100 strait soot balls. So lowering the comb did the job & he is happy as a clam.
     
    wpt and Storeman like this.
  26. Shooter-007

    Shooter-007 Well-Known Member

    This or a big bead can work beautifully to raise POI
     
  27. 635 G

    635 G Mega Poster

    When to the patterning board today--compared 3 guns:
    1) the 391 I put together for sporting patterned 50/50

    2)My DeVault 391 conversion which I will use for doubles only--patterned 80/20

    3) My Infinity for singles & caps patterned 140
     
  28. Dave Berlet

    Dave Berlet State HOF Founding Member Member Trapshooting Hall of Fame Member State Hall of Fame


    I just have to ask you a question. Please explain to me why raising the front of the rib wouldn't lower the point of impact? I don't understand your line of thinking.

    Dave Berlet
     
  29. 635 G

    635 G Mega Poster

    I had the rib as high as it would go and the comb as low as it would go and todays patterning certified is was 80/20==this is on my DeVault 391
     
  30. nickthanos

    nickthanos Well-Known Member

    Think about it this way. If you had no beads at all on the gun, raising or lowering the comb would indeed change the impact. If it shoots high, sanding the comb would lower the impact. If you shoot rifle or pistol, the rear site is moved to change point of impact. Your eye is the rear site on a shotgun. Lowering the comb changes your rear site. The beads are merely for your site picture to get your figure eight. Works every time. Move the comb in the direction you need your shot to go.
     
  31. 635 G

    635 G Mega Poster

    There was no way I was going to sand a custom DeVault stock comb--I'm happy with cheap route I've taken
     
  32. nickthanos

    nickthanos Well-Known Member

    If the stock was custom made, the maker should have had you shoot a try stock for point of impact, and make your new stock to those dimensions. Otherwise, what is the point of a custom stock. The gun has to shoot where you are looking. Otherwise you can say what a pretty stock. Can't hit anything with it, but it sure is pretty.
     
    rookieshooter likes this.
  33. 635 G

    635 G Mega Poster

    My custom 391 was made for me shooting TRAP (10 years ago), played with it for sporting clays--didn't work

    Was not going to booger it up for sporting clays--coobled up another 391 for sporting, will see if it works