1. Attention: We have put together a thread with tips and a tutorial video to help with using the new software. Please take a moment to check out the thread here: Trapshooters.com Tutorial & Help Video.
    Dismiss Notice

.038 full choke vs .038 full choke?

Discussion in 'Shooting Related Threads' started by dale58, Sep 13, 2011.

Thread Status:
Not open for further replies.
  1. dale58

    dale58 Well-Known Member

    Joined:
    Mar 22, 2011
    Messages:
    1,114
    Location:
    Lynn, Ma.
    If you have a barrel with a .750 bore and a .712 choke will it preform the same as a barrel with a .735 bore and a .697 choke? Both have .038 thousands of constriction, but the .697 choke is .015 tighter than the .712 choke. Will the .712 choke preform as well from the 27 yard line? Dale
     
  2. BigM-Perazzi

    BigM-Perazzi Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    8,542
    Location:
    HELL, MICHIGAN
    Probably!
     
  3. wayneo

    wayneo Active Member

    Joined:
    Jan 29, 1998
    Messages:
    3,002
    In theory....yes. Some would say the larger bore is better because of less pellet deformation. But I have seen some old full choke barrels that can reach way way out there.

    Wayne
     
  4. short shucker

    short shucker TS Member

    Joined:
    Jan 29, 1998
    Messages:
    3,939
    Yes.

    Personally, I'll take the .750" bore barrel over the .735".

    ss
     
  5. superxjeff

    superxjeff Active Member

    Joined:
    Jan 29, 1998
    Messages:
    3,781
    I can not answer your question but I will say this. You can have a choke that is 38 with a 727 bore or one that is 38 with a 745 bore. Either way the barrel will have a load that it likes or a shot size it seems to prefer.

    I have seen guns with the same bore and constriction that would not pattern a hunting load anywhere close to each other. I do not know why this is, just that it is.

    The problem with target loads is that diffrences are not as easily seen up close ( 35 yards) and with large pellet counts people become prone to eye balling a pattern vs counting holes.

    When you shoot a 1 1/2 oz load of copper plated lead BB's it starts out with 75 pellets. When you shoot it at 55 yards a barrel that will do 55 BB's vs one that does 45 BB's is easily seen.

    Some guns prefer a certain size shot and with trap loads the time and effort to figure it out with all the wads,powder and primer combos you could make a full time job out of determining what load is "best" in your gun.

    The only way to know is to choose a load and shoot it through both guns and count the holes. You need to do it 10 times to really get a true idea. That is a lot of pattern work.

    In theory both barrels are providing 38 points of choke and they will both act like a barrel with 38 points of choke. Which one will be better? Only one way to find out. Many will profess that with a larger bore you should have less pellet deformation and thus more pellets in the pattern.Jeff
     
  6. Dr.Longshot

    Dr.Longshot Banned Banned

    Joined:
    Jan 29, 1998
    Messages:
    5,722
    Personally I would take the .740 bore, the .750 bore has some bloopers especially in cold weather, and wad selection has a lot to do with that blooping problem.

    I will side with Al Ljutic that the .740 Bore is the optimum.

    Gary Bryant
    Dr.longshot
     
  7. Gapper

    Gapper TS Member

    Joined:
    Feb 26, 2010
    Messages:
    823
    The .750 barrel will have less percentage of constriction.

    .750/.038 vs. .735/.038, gives a difference of 0.11%; so the .750 has less percentage of choke and a potentially a larger pattern. I don't know if any one could tell the difference in a tenth of a percent, and there are other factors involved.
     
  8. Ross

    Ross Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    2,646
    I only did this with 1 gun of each gauge but. Have you ever compared patterns from std. bores 20ga vs. 12ga with the same payload--shot size--muzzle velocity--etc. When I did this comparison test there was more difference in the pat. percentages and appearance due to different shot sizes than bore size, both printed similar diameters @ the same distance but when shot (viewed) on water and in fresh snow the 12 ga with its larger bore showed a shorter shotstring so I would think that there would be more pellets in any given area at any given time that the target was passing through. So I guess I would have to vote for the larger bore. Geeeeeee do you think maybe that's why the 12ga is the most popular ga.???????? My inquiring little mind wants to know. Ross Puls
     
  9. Texshooter

    Texshooter Member

    Joined:
    Jan 29, 1998
    Messages:
    710
    According to one barrel maker; it takes less choke in the larger bore to get the same tightness pattern. AJ
     
  10. hmb

    hmb Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    9,442
    The important thing is who did the barrel work and who made the choke. HMB
     
  11. Jim Porter

    Jim Porter Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    1,316
    You have too much time on your hands and for sure I CAN MISS WITH EITHER ONE!!!

    Good shootin
    Jp
     
  12. BILL GRILL

    BILL GRILL Well-Known Member

    Joined:
    Sep 18, 2006
    Messages:
    3,764
    Personally I like the Question. Opens a whole new theory to what a full choke is or is not. There are a lot of shooters out there who have no idea what this is about. So if you open the chamber you can tighten the choke? Bill
     
  13. racer

    racer TS Member

    Joined:
    Jan 29, 1998
    Messages:
    541
    Let me guess- no one on this thread has read Dr. AC Jones book? Dan
     
  14. Bob Hawkes

    Bob Hawkes Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    3,916
    I also like the question Bill. Did you mean enlargening the chamber or the bore?
     
  15. Dr A C Jones

    Dr A C Jones Member

    Joined:
    Jan 29, 1998
    Messages:
    367
    Probably not a lot of difference, and almost certainly none that you would notice on a day to day basis.

    When I measured a near nominal bore gun and a backbored one, their full choke performance was in all practical senses the same. The line on the graph below shows the pattern diamter over 20-40 yards for the two full chokes; it's clear they are both near enough the same.

    [​IMG]

    I did also measure the performance of the minor gauages, and it transpires that as the bore decreases the ultimate tight pattern capability of the gun also decreases. This implies that bores over the nominal 12-gauge should pattern tighter unless that is a bore size somewhere around nominal for a 12-gauge is the optimum for the payload weights and pellet sizes we use for clays. We'll have to wait for Neil's .750" results . . . . .

    Andrew.
     
  16. BILL GRILL

    BILL GRILL Well-Known Member

    Joined:
    Sep 18, 2006
    Messages:
    3,764
    Bob, Meant to say bore. Friday nite is beer nite! Regards, Bill
     
  17. racer

    racer TS Member

    Joined:
    Jan 29, 1998
    Messages:
    541
    Eddie- the question that started the post was a very good one. I see the good DR put some data towards the answer. Data is what drives the correct answer to this type of question. Read the book and evaluate the posts this question drew. Have fun, Dan
     
  18. Brian in Oregon

    Brian in Oregon Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    25,251
    Location:
    Deplorable Bitter Clinger in Liberal La La Land
    This was the idea behind the factory backbored Remington 1187 trap barrel. Instead of a .727" bore, they have a .745" bore. Remington says the idea is to make the center of the pattern more dense, and from what I've patterned that appears to be true.

    The biggest benefit to me, though, is that I'm getting nice, even patterns with cheap soft pellets, whereas my .727" barrels need harder shot to duplicate this.

    The upshot is that I can use cheap promo loads instead of premium loads, saving money.

    Of course, if you really want upgraded performance, put premium shot though the backbored or overbored barrels.
     
  19. dale58

    dale58 Well-Known Member

    Joined:
    Mar 22, 2011
    Messages:
    1,114
    Location:
    Lynn, Ma.
    Very interesting responses, you guys really know your stuff. Dale
     
Thread Status:
Not open for further replies.