Advice needed

Forums Big Bores & Arrow Shooters Advice needed

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    wyshadow
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    I've been thinking of this problem for a long time. I've been wanting a bullet shooter for a very long time. I will mostly be using this next gun for target shooting but will also use it for long range prairie dog shooting (over a 100 yards) and coyote hunting. There is such a big price range between the guns I'm considering. I'm looking at the sumatra in .25 and the texan in 308 or 257. Not sure which to choose. If I do get a bullet shooter, I don't think I'll cast my own bullets because I think that's a hold new hobby to take on and I just don't have the time to start that. I may go as far as resizing but not much further than that. Power wise I want a flat shooting gun to help with coyote hunting in my area. I don't care about shot count so two or three shots are ok with me but still maintain accuracy.

    The sumatra seems like a good gun because out of the three options, it is the least cost, good shot count, seems to be accurate, shoots both pellets and cast bullets, has a mag, and good power. From what I could find, it looks like power comes in just above 100 ft-lbs but it would be great if I could get more. Tuning wise, not very many people will touch the sumatra.

    The texan looks good for its huge power, design for shooting cast bullets, seems to be accurate but it doesn't have a mag, looks awkward to shoot, and looks like I have to spend more money to get the gun shooting at its potential. I like the power the 257 is putting out at 180 ft'lbs and I believe 200 ft-lbs for the 308 which is great. The 308 looks like it has the biggest array of weight options and style of bullets to choose from. It seems like the texan has a huge following and I don't think I will have a hard time finding someone who will help me on tuning the gun.

    Another problem I'm also having is choosing which caliber for my situation. What advantage and disadvantage does each caliber have to each other? I don't want any caliber bigger than a 30 cal and I'm only looking at these two brands. It wound be nice to afford a Slayer but that's way over my budget.

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    bubblerboy64
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    1. Honestly having hunted prairie dogs you don’t get that many shots inside 150 yards.  
    2. If I was putting together a gun  for what you are considering I’d go with a suppressed bolt action 223
    3. if you are set on an air rifle I really am no help other then to say with coyotes in the mix probably the heavier bullet the better
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    wyshadow
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    For hunting prairie dogs in my area, I can get several shots  Under a hundred when I first drive in but bubblerboy64, you are correct most prairie dog shots will be over 150 yards. I'll mostly be using my 243 which devastating on a prairie dog towns. I don't really care much for 223's

    Idk. I have my 25 wildcat and anything under a hundred is dead with that gun. Wondering if my next gun will be a mistake. 

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    bubblerboy64
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    .  I like the the 223 because you can spot thru the scope.   

     

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    Loren
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    The Texan in .257 was my choice for long range shooting.  It is pushing over 190fpe in completely stock form.  It was a winter purchase so have only had one chance to get it out for long range practice, and it is showing great promise.  With a DonnyFL extended Emperor on it prairie dog wouldn't have a clue to what was smacking their cousins.  I know you said casting is not in your plans, but there are some great molds in .257 that are doing very well in the Texan.  It also is part of the fun for me.  It is also pretty good on air consumption in the .257.

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    T3PRanch
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    .257 Texan on a Mad Dog Stock. I have one and I also have a Condor converted to .257. 

    Best Coyote and PD guns for the money in my book.

    I do cast my own bullets for both (for all my Big Bores). They can still shoot pellets with great accuracy too.

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    wyshadow
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    I went with the Texan .257. Thank you everyone for your input. I should have the gun in about two weeks or less.

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    wyshadow
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    After a month of waiting, I have everything needed to go out tomorrow and finally shoot this gun. Here are some pictures

    This is a long gun. Almost 5 feet

    I had a gunsmith thread the barrel for me

    And here is the gun next to a broomstick

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    Loren
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    She is a tall one for sure!!

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    JimNM
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    Man, that is a platform!  I bet we won't be shooting from the front seat with that puppy!

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    steveoh
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    I love my .257 Texan. It is accurate, powerful and quiet with the Clague Suppressor. I sight in to 100 yards and have a mildot cheat sheet for closer and further distances.

    A cautionary tale: be religious about cleaning your barrel. I get about 50 shots before it’s time to clean. Go beyond that and you’ll get leading. 

    I use a 4 hole Arsenal 257420 mold and cast in pure lead. I’m experimenting with lubing the bullets. Not sure if they are happier with RC silicone shock oil or Tungsten Disulfide. The latter makes the bullets so slick they are hard to pickup. 

    I just bought a rifle here called a .257 Citrus and holy cow Batman that thing FLINGS the lead at 3600 psi. I have only shot a dozen shots but the kick and noise is quite substantial. More on this after I get quality time and and some chrony and accuracy results.

     

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    wyshadow
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    I shot my first time with the gun this morning with Jim and my first impressions with the gun is…It's ok. Not great but not bad either. I was shooting the 72 grain Spitzers at 1002 fps and was getting about an inch at 50 yards and 2 inches at 100 yards. Filled the tank to 200 bar and shot the gun down to about 160 until the bullets really started to drop which was about 7 to 8 shots.

    I know there is plenty of potential in this gun. I just need time to test each type of bullet I got for it. I only shot one type this time around.

    The trigger was not great but not bad either. The length doesn't bother me but how thin the gun is does bother me. I understand why everyone puts a stock on it because the gun feels flimsy. It needs some meat on the gun. Just imagine shouldering your broomstick. not much difference.

    Resting my check on the tank didn't bother me at all and was comfortable shooting the gun. The part I hated on the gun was the butt end of the gun. The part acting as a butt plate is very uncomfortable to rest a sandbag on. A stock would make this gun much better to shoot for sure.

    The emperor made shooting the gun very enjoyable to shoot. Jim was saying the gun wasn't much louder then his .25 mrod.

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    JimNM
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    Yep, that gun is a monster.  Tuned as it was, Wyshadow's gun was scaring my 10/22!  The new gun shoots fine, but I can see how it will be an acquired taste.  Put a couple of 1000 rounds through it and it will become like an extension of your body… a really long extension ;) 

    Single shot and 8-10 shots on a tank, it will take a while to shoot 1000x.  Good thing we have our own domestic air supplies.  I shot 1500 lbs of air today, and refilled the tank in about 40 minutes.

     

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    wyshadow
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    For the past three days, I've shot several hundred bullets tuning this gun until I'm almost down to it favorite food. After I I filled the gun at 3200, 3100, 3000, and 200 bar with each bullet at 1/4 and 1/2 power levels, I found my three best numbers.

    1st place the cheap 72 grain from some dude on eBay.

    1-1033      Av-1012

    2-1028      ES-49

    3-1024      SD-19

    4-1007      Shots 1-3

    5-999        Av-1028

    6-984        ES-9

                     SD-4

     

    2nd place is the 80 grain NSA slugs.

    1-949       AV-975

    2-979       ES-40

    3-989       SD-14

    4-987       Shots 2-5

    5-978       AV-983

    6-968       ES-11

                    SD-5

     

    3rd place is the 70 grain NSA slugs.

    1-893       AV-903

    2-915       ES-27

    3-914       SD-11

    4-908       Shots 2-5

    5-901       AV-909

    6-888       ES-14

                    SD-6

    After choosing the 72 grain bullet's chronograph numbers and I couldn't replicate the numbers I got. The best I could get was this:

    1-1054    AV-1020

    2-1037    ES-73

    3-1028    SD-73

    4-1020    Shots 1-3

    5-1000    AV-1039

    6-981      ES-26

                   SD-13

    I went out to zero the gun at 50 yards and shot to 100 yards to figure out the bullets drop.

    I recovered this bullet at a dirt pile at 144 yards

    One thing I noticed about this gun is I'm not impressed with the 50 yard group but I am impressed with the 100 yard group. At 50 yards, one goup would really suck and the next 50 yard group would be great even though I filled the gun to the exact pressure

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    steveoh
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    I am filing to around 2800psi, and seem to get better consistency.  How often are you cleaning the barrel? 

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    wyshadow
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    I usually clean the barrel after I'm done shooting the gun over chronograph which is about 50 to 60 shots. I then clean the barrel when I get to the house after I'm done at the range but I only put about 40 shots through the gun

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    wyshadow
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    I was talking to another air gunner about the texan and he mentioned something that might be the problem I'm having with the gun not grouping as well as I hope it would. He was telling me most higher end barrel makers usually tread the barrel end for an add-on before the barrel is drilled for a specific caliber and the reasoning for this is because if you thread the end of the barrel after you drill it, the end will expand slightly which might cause inaccuracy issues. He did mention he doesn't know much about slug barrels but he does know this is what they do for pellet barrels. Does anyone know anything about this? Did I just ruin my barrel by threading the end in order to get a cleaner look?

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    Bullfrog
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    I can’t offer an opinion as to the barrel threading, except that its pretty normal to have a firearm barrel threaded after production, so I would guess there are ways to do it without hurting the barrel  

    Are you sure your spin lock air tank is tightened down tool tight when attached to your gun? I’ve found that a hand tight, but tool loose, tank is the number one cause of accuracy issues in my Airforce guns. This is the reason why aftermarket stocks like the Mad Dog can increase accuracy. They stiffen up the gun at its weak point. That weak point is where the tank attaches. If that point isn’t as tight as it can reasonably be without breaking your wrench, it isn’t tight enough. 

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