Veteran Standard 25 HST adjustment help

Hey all,

Working with my Veteran Standard in 25 and having a couple of issues with adjusting the HST. I’ve got one of Donnie’s HST adjusters in there (I had the same issue with the stock adjuster though so nothing to do with his adjuster) and I’ve been working with trying to tune it for the JSB Heavy MKII 33.95gr pellets. It seems I max at at around 860fps with the HST turned way in (still awesome speed, I know) before it gets to the point where I can’t cock the hammer anymore. Once I turn in the HST to a little past the point where I get the 860fps with the heavies, I can’t cock the rifle. Back it off just a little, and I can cock it again. I also tried the heavier spring from Ernest but it’s the same problem, the adjuster just sticks out further. When I take off the side cover to see what is going on in the trigger/hammer area, I can see that the catch on the cocking lever/arm (whatever you call it) just doesn’t have enough room to catch the hammer and pull it back, almost like it’s bottoming out because the spring is compressed so far. Seems like it could be fixed by adjusting something, but not sure where to start. Any one have an idea of how to get around this or do you all think that’s just it? Greatly appreciate any help.

By the way, this thing is awesome!

Thanks

Gary

bizill

Participant

August 19, 2017 at 2:56 am

I haven’t shot any groups since I’ve upped my foot lbs but before that in the dark it was an easy .825″ @ 100 yards with shots taken in haste.

garymb

August 19, 2017 at 2:22 am

Well I just got done testing with the MKII heavies again. I started under 800fps and turned the HST in about a quarter turn and kept checking with the chrony. The highest I ever got was 870 which was just barely backed out from max so I could cock it. I turned it back down about 1/8 of a turn or so and have it back at the 860 I had it at.

Definitely will require messing with the reg if I wanted to go higher but I don’t dare mess with it since it’s shooting so well, has plenty of power and is quiet as hell with the Ronin. I haven’t had a chance to push it out to say 100 but I’m betting it’s going to be plenty accurate at the speeds I’ve got it at. I think the roughly 56 foot pounds of energy I’m getting will also suit me just fine for my hunting needs as well so I’m happy.

Thanks again all for the input and discussion.

August 17, 2017 at 10:49 pm

Before I bumped up the power I was getting 927 fps for 25.39gr and 827 with 33.95.

Now like I said, I’m at about 880 with O.G. 33.95 MKI and haven’t checked my 25.39.

I believe the MKI makes for a tighter fit/seal than the MKII, yes? Hence my fps is a bit higher but wow, these things come in pretty equally without huge variations in fps as you’d have with a lesser brand.

August 17, 2017 at 9:57 pm

Thanks for the info Tony. That’s about exactly what I was getting. I got about 860 with the heavies but haven’t run the 25gr Kings over the chrony yet since I maxed out the HST. I think I’ve read here on the forum that the reg has been set around 140 or 150, is that right?

anthony266

Keymaster

August 17, 2017 at 9:20 pm

I was just setting up a Standard Vet .25.
With HST maxed out I was getting Jsb MK II 34 grn at 850 FPS
and 25 grn Jsb Kings at 950.
So the approximate 10 grn difference equaled an approximate 100 fps difference.

August 17, 2017 at 7:11 pm

Yeah, I’m going to have to play around with mine a bit when I have some time. My goal was to figure out all the corresponding HST settings to velocities so that I could fine tune my power and accuracy for each pellet. Then I can use different pellets for plinking, hunting, or whatever and know which is the most accurate for each and be able to simply turn the HST adjuster to where I need it each time. I’m guessing that if I want more speed than the 860fps with the heavies I’ll have to mess with the regulator, but really don’t know if I want to mess with it since this rifle is shooting so damn good!

Thanks again you guys for all the input and guidance.

August 17, 2017 at 1:26 am

Just went out back with the ‘ole chrono. My Veteran does not exhibit this behavior. I have mine to just under where it won’t engage the sear or what not. That puts me at about 880. I back out a little, then alot and backing out just lowers fps. So I bumped it back up to just before the point it won’t cock.

Perhaps there is more tuning and/or regulator experimenting to be done as I still may be wrong. But I bumped it up and got back to 880 and am leaving it there. Maybe I should have backed it out even more, although I did back it out like a full 4 turns. Maybe I passed the bell, which would mean there is a double bell? :suprisedn: :suprisedn: :suprisedn: :confusedn: as I obtain the fastest reading screwed completely in.

Perhaps Taipan did their homework and limited the adjustment so the user cannot surpass the bell? Maybe they optimized it? Or would that change completely when you up the regulator pressure? As in, the bell would fall at a different spot whilst screwing. Am I making sense?

Or I may have hit the limit before having hit the plateau?

August 17, 2017 at 1:01 am

Then you must label me a dumbass ass well. I just set for max until I couldn’t COCK anymore. You saying I may have passed my highest fps and then settled at 885? Man, I really need to pay more attention. Sorta like when my dumbass started shooting that long shot at low pressure, even though this smart guy had a chrono in front of my face. Actually, you don’t tend to pay attention as you’re trying to think about where your last shot landed, checking to see if wind has changed and trying to get back on target again. Rookie mistake, I suppose.

So now I’m gonna have to play with my bell curve instead of my bell end. I did all this adjusting on the fly as I got out to he desert and set up my cameras. Soooo damn much going on. I will have to see if I back it out some perhaps I’ll gain a few fps. Thanks Donald, for making me paranoid. 😐 :4:

August 16, 2017 at 11:55 pm

Awesome guys, thanks so much for the quick replies. I thought I had worked it up already but now reading Donny’s post I think I did it in too large of increments and probably missed the higher max. I will take another crack at it and see if I can find out where the max really is on the HST. Not sure if I want to mess with the reg so if 860 turns out to be max I’m still happy with that.

donnyfl

August 16, 2017 at 11:19 pm

I agree with Bizill my nizzle, you’ve pretty much maxed out with the current regulator setting. You’ll need to adjust the regulator up to increase more air. Also I am sure you already know this but when adjusting the HST, it’s a bell curve. you start with low fps then the more you turn in, the fps goes up. Keep shooting through the chrony and adjusting. Once you see the fps starting to fall down, try to remember what the highest fps was. Now turn the hst adjuster out just a few turns then go back to turning it back in until you get close to that highest fps number from before. Screwing the HST in all the way will not give you the max fps.

August 16, 2017 at 11:03 pm

My guess is to up the regulator or get an even heavier spring for HST, if available. My Donny adjuster and my particular Taipan get to about 885 fps with 33.95 jsb’s. I’m still learning the gun myself.

Veteran Standard 25 HST adjustment help

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