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Author Topic: Texan tuning and possible mods  (Read 303 times)

Steelhead

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Texan tuning and possible mods
« on: October 25, 2017, 12:19:18 PM »
I'm hoping to try to make some improvements on my .308 Texan. Some things that would like to know are really basic and apply to the general principles of airgun mechanics. Here are some things that I'm just a little confused on. If you have input, the more dumbed-down, the better  ;D

The Texan self regulates but has a tuning wheel. The instructions were vague as how to use this. I don't know which way is "more" and which is "less".


Should I change it at all? Right now I'm somewhat in the middle.


I shoot a lot of different ammo from 44 gr. round ball to 198 gr. slug. If I used the wheel properly would it markedly help accuracy and/or air usage?


I'm seriously considering a shroud. While the noise doesn't bother me, it couldn't hurt to quiet it down since I hunt on the property I recreationally shoot. However, accuracy is more important. I know R&L has a shroud, but would a carbon fiber sleeve possibly be better for performance?


Would a muzzle brake have any use on a Texan, or is it just a way to pimp out the gun for cosmetic's sake? 


Considering a Maddog stock at some point...has anyone used that and if so does it make a difference?


  • Petaluma, CA
Airforce Texan .308
Benjamin Armada .25
Benjamin Prowler .177
Air Venturi compressor

Alan

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Re: Texan tuning and possible mods
« Reply #1 on: October 25, 2017, 02:11:06 PM »
Well, I gave you my opinion before, so I'll do it again.

One of the guys I shoot with occasionally, has your exact Texan. It is LOUD!!! He bought a suppressor for it (Huggett I think), and it did quiet it down. But it sure made the gun l o n g! And like you, he messed around with different weights, but settled down to some 88 grainers. It shoots okay, but it sure isn't a dead ringer compared to my WAR Cobra. I suspect with the right bullet and some tweaking of the power wheel, it will tighten up the groups. The same goes for yours, but it takes time to find what works best. But fix the scope issue first!

  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

Steelhead

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Re: Texan tuning and possible mods
« Reply #2 on: October 25, 2017, 07:58:02 PM »
I'll keep this short...

I purposely asked some specific questions to avoid random musing.

I've said it before, I don't give two $#!T's that it's loud. I've got a $5.00 pair of ear muffs if it bothers me. Accuracy is my goal.

'the right bullet and tinkering with it will tighten groups'...no shit?

We know it's not as good as the WAR Cobra, you've made that clear.


How is any of this relevant? There are Texan owners who frequent here with some amazing pieces that have been modded out to the max and they achieved fantastic results. Some simple suggestions for a stock Texan would be second nature for them because they actually OWN one or know the Airforce platform enough to offer fact-based advice.

  • Petaluma, CA
Airforce Texan .308
Benjamin Armada .25
Benjamin Prowler .177
Air Venturi compressor

Alan

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Re: Texan tuning and possible mods
« Reply #3 on: October 26, 2017, 05:29:39 AM »
It would behoove you not to be so acerbic.

No one can give you a bullet weight and adjustment for the ultimate in accuracy. While one given weight and velocity might work well for a series of guns, just one specific projectile and velocity might well be the panacea for your Texan. But only trial and error will give you that combination. Remember too, no one holds a weapon exactly like anyone else. Add in a difference in bags and/or bipods, and some combinations of weight and velocity will never shoot accurately.
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

nielsenammo

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Re: Texan tuning and possible mods
« Reply #4 on: October 26, 2017, 07:30:53 AM »
Cant help on the Maddog stock I've heard arguments both ways but my guess is it would not hurt, I've heard more good than bad by far.

I own a 45 and 35 Texan and we have a 30 cal Texan in our shooting groups.  The gun is way more accurate with the RL shroud.  I think any well made shroud will do it but my friend put the RL shroud  on his gun and groups tightened up a lot.  The shroud helps to take some of that barrel whip out of the gun.

I have not found a bullet in that gun that makes it a tack driver.  We have tried many bullets I have made for it, bought from several vendors and nothing makes that gun shoot in what I would call at least, exceptional.  In my experience the accuracy of the Texan is the 45, then the 35 and the 308 being the least accurate of the three.

I rebarreled my 35 cal because I was not happy with the accuracy and now I have a short barrel that only goes past the frame by an inch or so.  I made bigger barrel bushings and end cap bushing to support the entire barrel.  Now it gets good accuracy but less power from the shorter barrel.  I will take accuracy over power, sound or looks all day long.

The power wheel I only mess with if the bullet is shooting very slow coming out when I am trying to shoot heavy bullets or something.  Otherwise I put it in the  middle and leave it.  It will not affect accuracy much if any.  I also would do all your testing on a tether if you can.  Take the variables out.  Then when you find the bullet you are happy with you tune your gun the best you can to that bullet.  If you test untethered you may pass on the magic bullet because you gun was not tuned for it and you thought the bullet was no match.
  • La Verne, CA
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Steelhead

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Re: Texan tuning and possible mods
« Reply #5 on: October 26, 2017, 07:43:11 AM »
Right on Nick...thank you. We've spoken about the accuracy of the .308 before but I'm finding regardless of the eccentricities of the gun my limited knowledge of it sends me spinning in different directions. It's easy to get distracted by the power wheel when you aren't getting the results that you need and your response was perfect.

Another thing that I know that has hurt me is playing with too many types of bullets at one time. The variables of ballistics, air pressures, tethered vs. non-tethered, distance, scope power, etc. have made me go in circles. Don't get me wrong, I like the challenge but at the same time I don't like wasting money and time just lobbing stuff at the wall to see if it sticks. I like to base my experimentation on at least a little bit of fact or knowledge.

My new Air Venturi compressor is up and running so tethering now is not a problem as I can fill as often as I want 20' from my shooting bench!  :D  After I resolve my scope issue and stop hitting the dirt at 30 yards I will start sending you some chrony info/groups etc.

SteveO gave me some sage advice too; find a projectile and stick to it. It's so easy with the big bore slug launchers to get caught up in trying all of the different bullets, but in reality for a newbie it's just information overload.

Turkey season opens in a few weeks and I can't wait to add some more meat to my freezer. Should go well with the crab opener next weekend!  ;)
  • Petaluma, CA
Airforce Texan .308
Benjamin Armada .25
Benjamin Prowler .177
Air Venturi compressor

nielsenammo

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Re: Texan tuning and possible mods
« Reply #6 on: October 26, 2017, 07:56:37 AM »
Sticking to one bullet is a good idea.  Even I do.  I can make an endless amount of different bullets with all my equipment but once I find the right bullet that is the bullet I shoot.  Then I know what to expect and get used to the drops, etc.

The only bullet I have made that shot decent out of the gun is not on my site.  It is a new .308 die with a smaller HP than the ones posted now.  Tethered, the gun shot them fairly accurately but we have not shot it untethered.  It is not my gun so not something I can shoot on a whim.

I have sent some to one of the sponsored shooters of Airforce so we will see what he says.  He has not shot his .308 yet.  He is also testing my ammo in the new 45 Texan SS so awaiting results on that too.

A while back I ordered the coolest thing for testing but have not received yet.  I ordered a new swage die press that is portable.  I will be able to grab a gun, lead blanks, the press and dies and go into the field and make bullets as I test.  If I want to make them 5 grains heavier and see how they shoot I just make 5 or so and shoot them.  I can keep adjusting the swage die to any weight I want the bullet and shoot them.

Currently I have to make 50 bullets of each weight or design, shoot them, come back and narrow it down to the best shooters and make more, 50 at a time.  I end up melting hundreds of bullets that do not shoot well each outing and can be as many a 1000 bullets I made by hand that get melted.  This will be a huge time saver.
  • La Verne, CA
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rsterne

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Re: Texan tuning and possible mods
« Reply #7 on: October 26, 2017, 08:34:07 AM »
One of the statements in your first post makes me ask this question.... What is your intended target?....
Quote
I shoot a lot of different ammo from 44 gr. round ball to 198 gr. slug.
I don't know of ANY gun that will handle that range of ammo.... and certainly not without huge changes to the tune.... Using a 198 gr. slug in a .308 is impractical unless you are running huge pressures (well beyond the 3000 psi recommended by Air Force), so right off the bat, that seems an unlikely choice.... Let your quarry dictate a reasonable range of bullet weights.... Yeah, you can tune it down later to plink with roundball, but focus on your primary use first....

The 34" barrel will be problematic for accuracy, although great for bragging rights on velocity for Air Force.... Unless you do something to stiffen it up (shorten it, sleeve it, or support it) I think you will be disappointed in your results, no matter what bullet you choose.... I would suggest that first you focus on your requirements.... and that second you dial back the criticism of those who try and help....

Bob
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Steelhead

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Re: Texan tuning and possible mods
« Reply #8 on: October 26, 2017, 01:47:55 PM »
Points taken Bob. My only criticism is comments that always seem to be 'yours is ok but mine is better', 'why would anyone want to buy that' or something to that effect. That isn't help at all, it's just condescending. After spending over 5k in 5 months on my hobby (using a lot of the great advice I've picked up here) the last thing I want to hear is yet another post about how my equipment sucks. Considering that, I admit I could be a just bit hyper sensitive. Moving on...

You're absolutely right on the ammo variety. When I purchased the gun I bought boxes of everything because like everyone says you just don't know what the gun likes. So yeah, I shot round balls through 198 gr.  I could spit faster than the 198 gr. so you are indeed correct that they really have no usable purpose for my stock Texan. Probably the same for the 174's. It seems that everyone keeps coming back to the 154 gr. as a the most consistent. I have also had good results with 118 gr. at lower air pressures (1800 to 2100 psi)  shooting my most consistent groups of any bullet both on and off of the bottle .

Sleeves, supports...I'm glad you brought that up. I'm trying to consolidate some ideas and about the only thing out there that seems to actually have some worth is the shroud from R&L. There are other items, but I'm not sure if they are gimmicks and/or just for looks. I know African Ordinance has some stuff too, but I try to keep things domestic as much as possible for both cost and business support (Canada counts! ;)   Are there options for carbon fiber sleeves that may work better? I personally don't know of any for my gun. As I said, sound suppression isn't an issue so is it possible to apply a sleeve and not lengthen to overall gun (or maybe just an inch or two)? Do you think that an after market one piece would stiffen anything or would that independent of the barrel?

Intended target - complicated question. Here's what I had hoped when I bought the gun: hunt deer with it where legal, enjoy some long range (100-200) yards bench shooting, plinking, and some misc. varmint hunting. The reality is a little different (and hindsight is always 20/20). Most states are .35 caliber and up for big game so I probably will never use it for deer, it takes a lot more skill than I imagined to get an air rifle like this one to shoot accurately, and as luck would have it (although you wouldn't think so) the .308 seems to be the least accurate of the Texan line. All of that being said, I still like it a lot even though I can be frustrated with it. It's a learning curve and it's teaching me patience, persistence, and forcing to learn about the ins and outs of PCP's.

When it gets too bad I just pick my .25 Armada that Int3man work over for me and start shooting ragged holes at distance to get my confidence back!  ;D


  • Petaluma, CA
Airforce Texan .308
Benjamin Armada .25
Benjamin Prowler .177
Air Venturi compressor

Steelhead

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Re: Texan tuning and possible mods
« Reply #9 on: October 26, 2017, 01:51:05 PM »
after market one piece 'stock'...missing word in there
  • Petaluma, CA
Airforce Texan .308
Benjamin Armada .25
Benjamin Prowler .177
Air Venturi compressor

rsterne

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Re: Texan tuning and possible mods
« Reply #10 on: October 26, 2017, 04:29:35 PM »
I would talk to Doug Noble (dyotat100).... You can't go wrong following his advice on Air Force products....

Bob
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Steelhead

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Re: Texan tuning and possible mods
« Reply #11 on: October 26, 2017, 05:32:00 PM »
I've never tried to post a pic here before (hopefully it worked), but I think I found my accuracy problem. It looks like I melted fishing sinkers and poured them down the barrel. I'm embarrassed to say that I haven't noticed it up until now. It only took about 50 shots and having the scope/picatinny adapters off twice today and still not hitting the paper at 15 yards. Hopefully with a good cleaning things will start to make some semblance of sense again.

I'm exposing my ignorance because A) people have taken the time to help, and B) maybe someone else who's new like me can learn from this and avoid spending hours of time blowing air, bullets, and patience.

I wish this was as easy as setting tile!!  :o
  • Petaluma, CA
Airforce Texan .308
Benjamin Armada .25
Benjamin Prowler .177
Air Venturi compressor

Bullfrog

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Re: Texan tuning and possible mods
« Reply #12 on: October 26, 2017, 08:06:47 PM »
I can't help you with the .308 specifically, but my brother and I have been learning his .45 Texan. It loves both Neilsen's ammo and .457 Hornady roundballs. You might look for a .308 equivalent roundball and try.

As you've found, the barrel needs to be cleaned often. Every 50-100 shots. Seems to be a constant across those big bores I've owned and shot. They foul faster than small bores.

The Texan's valve is an odd thing. It does somehow regulate itself to match the weight of the projectile. I'm sure it has something to do with the backpressure of the projectile. A heavy bullet will allow the gun to start a curve around 3000psi. A light bullet or round ball will start the curve around 2600psi and will cause valve lock at 3000psi. Spinning the wheel towards the breech will raise your fill pressure starting point and overall power, spinning the wheel towards the crown of the barrel will lower your pressure start point. I think my brother leaves his around 2/3rd in towards the breech but can't remember what line that amount to if you count the lines from the crown to the breech.

The .45 can do ragged hole groups at 50 yards with the round balls and hit water bottles every shot at 100 yards. Surely there must be something somewhere that can give you acceptable groups in the .308. You'll just have to do a lot of experimenting.

The R&L shroud is nice. Quiets the .45 down quite a bit.

cootertwo

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Re: Texan tuning and possible mods
« Reply #13 on: October 29, 2017, 11:13:30 AM »
R&L shroud is nice. Quiets the .45 down quite a bit
I love mine too! Nice company to do business with
http://www.rlairgunsupply.com/air-guns-air-rifles/texan-shroud/
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