Texan

[Metnav1]

George, The REAL bullets do consistent one ragged hole groups at 50 yards and are still stable at 100 yards.  Not sure the comparison of barrel twist between the Texan and Extreme.  The Extremes are very slow twist.  I think my .408 is 1:22.  I am sure twist rate will have tons to do on stability at longer distances.  Maybe Bob or someone else can compare twist rates on these two guns.

The Texan is 1:20 twist. I did some testing on lighter bullets which were ok at short distance (50 yards) but not at 100 yards.

I swaged 370, 320 and 250 grain bullets all the same exact design but shorter to make lighter. The heavier/longer bullets did better in every design.

Nick,

I'm no expert of bullet stability, they either are or aren't stable at longer distances.  I'm certain the twist rate is important for a bullet, but not so sure of it's importance with round balls. 

I've only tested round balls out to 50 yards, but they look very promising, but so did a lot of bullets which I actually saw corkscrewing as they went further out beyond 50 yards.  I've read that they can tumble at longer distances, but I see corkscrewing, I'm not imagining it.

I was hoping round balls didn't suffer from the same gyroscopic effects that are hindering the lighter bullets.  I guess I'll have to wait until the weekend to find out.

Here's hoping Ha Ha

[nielsenammo]

Round ball is pretty accurate and cheap to shoot. My machine can make round ball with no flat spot but the tooling is expensive and already so cheap to buy I don't make it.

Problem with round ball for me is the BC is low so long range bullet it may not be.I don't waste that air per shot and noise and kick to not reap the benefits down range.

[sshewins]

How thick is the barrel wall? Do you think a CF sleeve would help with accuracy?  According to another post, R&L sells a shroud. Not sure if that would reduce groups or not. Kinda thinking out loud.

[shamu25]

what do you mean by corkscrewing, I remember when I first shot my AA 510, 22 cal at 50 yards and noticed through the scope that every pellet would corkscrew.  yet every pellet would fly through the same hole all day long at 50 yards. I think that maybe a natural phenomenon for air gun pellets. not exactly sure about air gun bullets

[QVTom]

Have you guys tried any Keith types for lighter ammo?  I'm thinking the rearward CG would play better with the 1:20 barrel twist.

Tom

[nielsenammo]

I have a Keith design and it does good, maybe the most accurate I have made so far. The cork screwing will give repeatable results at a given range. Problem is when you change yardage you do not know where the bullet will land.

Cork screw goes around like a clock. The further it gets from the muzzle the wider the circle becomes. So at 50 yards the bullet may hit at 3 o'clock but at 65 yards it may be at 8 o'clock and the circle gets wider as it travels.

The other problem also comes into BC of the bullet. If the bullet is Cork screwing it is traveling much further to go the same 100 yards. That means more drop and less energy retention on top of loss of accuracy.

I have held off selling pellets to further work out these problems. I target shoot on paper all my designs in different guns and twists. Much harder to do than I expected but I have learned a ton about how bullets, twists, speeds and chamber work together.

[nielsenammo]

How thick is the barrel wall? Do you think a CF sleeve would help with accuracy?  According to another post, R&L sells a shroud. Not sure if that would reduce groups or not. Kinda thinking out loud.

I ordered a shroud this morning and will report back when I get it and test it. I am in high hopes it does not impact POI and really tames the noise.

[Metnav1]

A shroud that works would be helpful... Looking forward to your results.

[Rock]

How thick is the barrel wall? Do you think a CF sleeve would help with accuracy?  According to another post, R&L sells a shroud. Not sure if that would reduce groups or not. Kinda thinking out loud.

I ordered a shroud this morning and will report back when I get it and test it. I am in high hopes it does not impact POI and really tames the noise.

Just got my suppressed Texan back from Neil C. and my God what an amazing difference! He did an outstanding job! The shroud extends 10" past the muzzle and now the hammer strike is noticeably LOUDER than any report. (He tried 8" first but he wasn't happy with that.) I asked about a CF shroud but he made it clear the pressures would be far too great, so it's steel only. I can't speak to POI shifts since I haven't had a chance to shoot it enough to even sight it in.

Quiet or not, it's a beast! 

Rock

[rickjoe11]

How thick is the barrel wall? Do you think a CF sleeve would help with accuracy?  According to another post, R&L sells a shroud. Not sure if that would reduce groups or not. Kinda thinking out loud.

I ordered a shroud this morning and will report back when I get it and test it. I am in high hopes it does not impact POI and really tames the noise.

Just got my suppressed Texan back from Neil C. and my God what an amazing difference! He did an outstanding job! The shroud extends 10" past the muzzle and now the hammer strike is noticeably LOUDER than any report. (He tried 8" first but he wasn't happy with that.) I asked about a CF shroud but he made it clear the pressures would be far too great, so it's steel only. I can't speak to POI shifts since I haven't had a chance to shoot it enough to even sight it in.

Quiet or not, it's a beast! 

Rock

Look forward to hearing more about this mod. How much $$$ if you don't mind me asking. Please let us know if accuracy was affected because of shroud. Also PICTURES.

[rickjoe11]

Just ordered some HIGH ARC HUNTER .457 SLUGS in both 315 gr. and 241 gr. from RL Airgun Supply 241 gr. Look forward to doing some tests in my Texan and my 909 Light Hunter

[supertech77]

rickjoe11 let us know how they work out,i like the 241 gr,looks good, not sure how far out they are accurate being so short though. as too the 315gr.] my testing with 245 gr,was great at 75yards,as was the 340gr,and the 195gr, and the 385gr bbts.75 yards out there one hole capable for me if i top off to 3300 psi after 3rd shot.

[rickjoe11]

Will do supertech77. My guess is they won't arrive for nearly a week....We'll see.
Thought it was BAD to fill Texan above 3000psi???

[supertech77]

not mine, it seems cause that,s what i been filling it at since i got it,not one problem yet, except i use a lot of air.lol never got a lockup,and it rips them at first and sec, and 3 shots,those are my hunting shots, don't got the curve figured out yet, with the many different gr bullets i am shooting,have not pickled a one and only yet,but for what i do, i got some great candidates.

[Metnav1]

not mine, it seems cause that,s what i been filling it at since i got it,not one problem yet, except i use a lot of air.lol never got a lockup,and it rips them at first and sec, and 3 shots,those are my hunting shots, don't got the curve figured out yet, with the many different gr bullets i am shooting,have not pickled a one and only yet,but for what i do, i got some great candidates.

I accidently filled mine to 4000psi, and the gun was happy to be dry fired back to 3000psi, without complete valve lock.  However, my shot strings on lighter grain ammo display valve lock. 

The 165gn Semiwadcutters have their highest velocity when the fill is 2500psi, as does the 147gn roundballs.

I haven't found a bullet yet that obtained it's highest velocity at 3000psi, and normally the second shot is fastest even with the heavy ammo.

[supertech77]

Not mine,not yet,maybe when I get the hang of the bullet adjuster,I could mayget valve lock,lol,I also have not shot 165gr bullets either,I tried a round ball once,did not adjust for it and it was at to low volocity,most often the lightest gr I shoot is
457/195, I guess different guns perform different. Lol

[Metnav1]

Just ordered some HIGH ARC HUNTER .457 SLUGS in both 315 gr. and 241 gr. from RL Airgun Supply 241 gr. Look forward to doing some tests in my Texan and my 909 Light Hunter

Hey if you have any success out at 100yards with the Texan let me know.  I couldn't get any kind of group on the 315gn, and the 241gn were a little erratic too.  I didn't really test them below 100yards, but they corkscrewed past the 50yard mark.

[rickjoe11]

Just ordered some HIGH ARC HUNTER .457 SLUGS in both 315 gr. and 241 gr. from RL Airgun Supply 241 gr. Look forward to doing some tests in my Texan and my 909 Light Hunter

Hey if you have any success out at 100yards with the Texan let me know.  I couldn't get any kind of group on the 315gn, and the 241gn were a little erratic too.  I didn't really test them below 100yards, but they corkscrewed past the 50yard mark.

So you have tried these already Metnav1??? Need a full report. lol  Currently I can only test out to 62 yards.

[Metnav1]

Just ordered some HIGH ARC HUNTER .457 SLUGS in both 315 gr. and 241 gr. from RL Airgun Supply 241 gr. Look forward to doing some tests in my Texan and my 909 Light Hunter

Hey if you have any success out at 100yards with the Texan let me know.  I couldn't get any kind of group on the 315gn, and the 241gn were a little erratic too.  I didn't really test them below 100yards, but they corkscrewed past the 50yard mark.

So you have tried these already Metnav1??? Need a full report. lol  Currently I can only test out to 62 yards.

I know RL said they were made for the Texan, and they might be great closer in, but I've been testing everything at 100yards because I think the Texans' maximum range should be 100yards.  The only problem I've had is finding ammo that's stable that far out.

Nielsonammo.com has some swaged bullets at 340-50gn, that are stable, but they are heavier than what I was looking for.  He's working on some lighter bullets that might work... He makes swaged bullets, they are cold pressed into shape, are more consistent in weight, and linear in construction.  The type I tested were great, I'm just hoping some of his lighter bullets will be as stable.

Tomorrow I'm going to test round balls at 100yards...  I have a 25yard, and 50yard range at home, but for the 100yard testing I use my local range, and Monday they are open, and not too busy.

The round balls are quieter, less kick, and perform really well with a 2500psi fill out to 50yards... They're also cheap Ha Ha

[rickjoe11]

I know what you mean with the lighter bullets. Especially since most of my shooting is done, whether hunting or target shooting, between 40 and 75 yards. (Just my comfort zone for safe humane kills)  BigBoreAirgunAmmo.com has a Ballistic Tip 325 gr .457/.458 that is reported by some to shoot VERY well at longer distances. I thing Rick Ward "The Urban Airgunner" has a You Tube video up where he is shooting it.

Rick