Texan and all compressor Owners Dont make this mistake

So yesterday Evening could have been a total disaster simply because of a brain fart. 

I filled my gun getting ready for a hunt and left out to the deer lease walked into a whole group of deer and found a legal buck, Sighted in on him at about 80 yards... A little far for my liking but doable he was broadside and none the wiser I had a good solid hold and so took the shot. Instead of hearing the known and satisfying pop of the Texan I hear PLINK ….. PARTAIL HAMMER LOCK 

I watched as my round dropped below his chest and hit the ground behind him with a great deal of relief knowing that the round while possibly heavy enough to penetrate most likely would have done nothing more than wound him. 

What had happened, I trusted a machine to do my job for me, I use my compressor to fill my guns and usually I keep it set at 2800 the top of my power curve in the Texans, forgetting that I had adjusted the compressor to fill my .25 at 3000. I had simply turned the compressor on grabbed the rest of my stuff while the gun was filling and disconnected when it shut off without verifying anything.

After the shot I was just thankful that I was far enough for the bullets drop at such range and low fps due to the hammer lock to miss the deer, but after thinking a bit more about my error I came to realize the damage could have been much worse, I didn't verify the pressure settings it could have been set at 4500 or anything 

A reality check that only hurts ones pride is something to be Thankful For 


 
Bummer!

I don't understand the valve lock thing though....the way I look at big bore hunting rifles is the first shot should be the most powerful that the gun can produce and not to worry about a power curve unless your looking for more shots on targets. I've mistakenly filled to 3200 before and didn't experience any valve lock just extra power. 

I do only fill to 3000 but with the hammer spring maxed out for the best first hunting shot. Even the second shot is only about 40fps slower and hits to the same zero at 100 yards. My gun is only a couple months old and maybe has the new TX2 valve I'm not completely sure but have never had valve lock in a couple hundred shots.

Just curious!!! James from Michigan 


 
For whatever reason James my .45 Texan will shoot at almost half power at 3000 PSI now I don't run my power wheel at 100% only at about 75% that is where I get the most accuracy 

After that first shot I am just shy of 2900 psi and I am on zero for my next three shots I've had three .45 Texans and all three did the exact same thing. My .308 is a different creature all together 
 
I dont know how you would get valve lock at only 3000 psi. I fill my marauder rifle to 3200 psi with stock spring and hammer and it had no problem opening the valve so I find it hard to believe a big bore would lock at 3000 psi. Maybe you filled it to 4500 psi. That's the only way I can see valve lock.

Huge difference in a .45 280 grn bullet and a .25 pellet,..... That kind of sounds like I am being a smart @#$ I'm not, the valve doesn't lock down fully just drops the power down to a point way lower than it should be. 
 
That's kinda weird but I'm getting the picture! Ive only shot 4 different slugs so far...290, 265, 254, and 220s all NSA ammo. 

And so far the 265s are spot on and the most accurate in my gun followed closely by the 290s..both being of the same slug design. Getting 3 good shots on max hammer tension....I guess when I get some time after deer season I'll have to play around some more and learn some more about this beast. It's my first big bore!

I was popping gallon jugs of water at 150 yards the other day and printed a 3 inch 4 shot group at the same distance. Refilling after 2 shots and shooting 2 more...

It's a blast to shoot but man I'm going to have to invest in a compressor...airhog!

James from Michigan 
 
I too have seen a Texan that if filled to 3000 and adjusted to anything less than 100% hammer would valve lock. But part of that was the guns gauge was actually reading 300 PSI low so at 3000 it was actually 3300. I could have just told him to compensate and fill to 2700 but had a gauge that was close to correct and swapped it out to make it easier to fill and check in the field.

The second issue was a weak factory spring. We pulled it and it was 3/8" shorter than my old AF factory spring (this is on a new rifle too!). After giving him my old spring there were no more problems with valve lock and he was able to get a better tune at 85% adjuster.

I recommended getting a spring from Dyotat100 if you are going to switch to a carbon fiber bottle and fill to higher pressures. I used TalonTunes CF bottles on my .257, .357 and .457 Texans and they all like 3400 fills (never fill the aluminum bottle over 3000!!!) combined with the Dyotat100 springs.

And I've pointed out to several people recently, here locally, that if you change anything you HAVE to go test it at the range to see what other changes it may have made to the performance of the gun!

Thanks for telling us your story and the warning so others in the community will hopefully learn too. Having situational awareness is not really natural, it has to be learned and cultivated. It's the little details like check your fill pressure that help us be safer and better sportsmen (sportspeople ?)