Tips for improve accuracy at 150 yards?

Well how are the groups with those projectiles and settings at closer ranges?

Wind flags. Your group is spread more horizontal than vertical.

Sorry to burst your thought bubble... Same barrel at different faster speeds does not mean less spin imparted to the pellet from shorted elapsed time in said barrel.

Faster forward motion will also mean faster radial motion. The ratio will be exactly the same for 600 fps and 1000 fps ( until ballistic coefficient starts to slow the forward motion...that is another ball of wax for another thread...)

Welcome to the world of airguns...it ain't simple like I thought it would be

As an aside, you are asking quite a lot when you expect tight little groups at 150 yard . Compare to what you can do with a .22lr at 150 yards. Are you a proficient shootist? There is more to the shooting system than just the gun.

Good luck amigo!

tiny_cabbages,

Get used to disappointment? Lower your expectations? Use a powder burner?

But seriously, asking +100 yard and/or windy condition CONSISTENT accuracy out of any pellet is a stretch. +100 yards and/or windy contions are definitely slug/pb territory. Kinda the wrong tool for the job, imo. Hard to tell from your picture how large the 150 yard group is? 8 inches? My Crown MK1 600mm regular STX with Kings @ 900 will do a 5 inch ctc 10 shot group at 150 yards in calm conditions. Any wind and I'm lucky to hit the target.

One thing you might try is the MK1 vs MK2 in the King Heavy. Some barrels prefer one over the other(my 600mm STX liked MK1 a little better). 

Crown MK1 with 700mm Superior Heavy shooting .217(sorted) JSB KnockOut slugs at 890 fps:



You see the yardage doesn't go past 125 because I couldn't consisently hit the 3 inch target circles at 150 yards.

You're probably really gonna like it when you get your slug barrels and start shooting slugs.

Good luck

For sure those extra 50 yards give you more problems than the first 100yards...until you can consistently group great 100 yards stay there ,then go to 125 yds....it is much easier that way...you will also get some more insight on how the wind can "push" your groups.

Called working your way up....or chain of command.lol.

34gr pellet with light to medium wind at 150 yards with no wind correction. The target looks about right. My guess is there was a bit less wind when you shot at 100 yards. Your 100 yard targets makes it simple what speed you should shoot that pellet at. Shoot it faster and groups open up. If you want decent groups with some wind at 150 yards you really need to shoot slugs.

Ted did some tests with different barrels and different projectiles a few weeks back maybe you can find something different for your STX barrel.



https://www.youtube.com/watch?v=qxDqZTmBlG8&ab_channel=HoldOverVlog



https://www.youtube.com/watch?v=xhhl2GtGFks&ab_channel=HoldOverVlog



Looks like not allot of tests went well with the STX barrel. I know I saw someone shooting good groups with slugs from an stx barrel but I can't find it right now.

Just wait till you get your slug liner grab some NSA .250 slugs and then shoot some 150 yard targets. I think you will be happy then.

I regularly shoot out past 100 yards. Using pellets I’ve had the best luck using .30 cal. Best I’ve gotten is a 6” group at 207 yards using an FX Boss in very light wind. THE WIND KILLS PELLET ACCURACY. Especially past 100 yards. Slugs are much more forgiving in the wind past 100 yards. I was able to get an 11” group at 310 yards with a .25 cal using slugs in a fair amount of wind. I was just screwing around. Once the weather breaks and I install a cold shot, so I can raise the magnification, I hope to tighten up the group. I can’t even find the target at 310 yards with a pellet. If a butterfly farts it blows the pellet off a foot. Good luck and having fun pushing the limits of the gun. 

Get closer.

...I googled it.

Mike

... If a butterfly farts it blows the pellet off a foot.

Click to expand...

Wind is terrible and most of the time you cannot even see it. It has created a A LOT of wtf moments for me and I was sure the majority of the issue was GUN related, nope, it's shooter and wind. 150 is long ways out and as suggested above.... lower you expectations and master 100yards first.

I have found the following diagram extremely enlightening about how different errors and inaccuracies affect a shot at different ranges.

Bob Sterne over at GTA made this, and he also published it in HardAir Magazine where he has written a bunch of very helpful articles (free online publication).



From the diagram you see how the effects of both wind estimation error (you misjudging wind by only 2mph) and ranging error (2% error of your range finder) are greatly increasing with range!

(With slugs these would be significantly smaller, though.)



Matthias 

Agree with the above. 150 yards is a long way out there. I know you see videos online of guys shooting small game and birds much farther than that, out to 200+ yards. But what they don’t show you are all their misses. What they also don’t show you is wind direction, which is just as important as wind speed.

Think of it this way. If you have a really finely tuned gun that shoots MOA at 100 yards for 5 shot minimum groups. You’re shooting at a ground squirrel sticking his head up to see what’s going on. You’re at 150 yards and shooting at a ONE inch target. Your finely tuned gun is only capable of 1.6 inch group at that distance. So if you hit the target in IDEAL CONDITIONS you were lucky. And if there was any wind at all, or you were off ranging by more than a yard or two, you were very lucky.

And shooting position matters also. In the field you’re not shooting off a concrete bench with your gun hard clamped into a 25 pound rest and a 15 pound rear rest that only allows forward and back motion. My point is don’t believe all the hype you see and read on the internet. A great deal of it is exaggeration.
A recent video shows two guys shooting soda cans at 200 and 300 yards. That’s really cool and all, and they did hit some, But if they were shooting at paper their group sizes would have been six or more inches at 200 yards and a foot or more at 300 yards. Certainly not MOA.

Your groups at 150 yards aren’t as bad as you think...

You will definitely get better results using slugs, if your gun shoots slugs with some accuracy. The funny thing is the slugs might not shoot as well at 100 yards as your pellets do, but the won't open up like pellets do at farther distances. It's a strange and magical phenomenon. That chart that Matthias posted is really a good representation of how far we open up with just a little wind and range mistake. Add in to that shooter error, we all have that, and you have an open group at 100 yards. I, and I'm sure more than a few here, enjoy this sport because it isn't easy. Keep shooting long distance, you'll figure out what you and the gun like and the groups will tighten.

5-6 years ago I was shooting my 29 fpe 22 caliber pcp at 100Y with decent success, meaning that if i was able to hit 7 out of 10 two inch round steels I was doing good. I stretched it out in 10 yard increments and it became largely a waist of ammo by 120Y.

So I bought a 45 fpe 25 cal thinking it'd be way better. Nope, it was better in the wind but it wasn't capable of any more precision. Yes I could hit more steel at 120Y but it was pretty much a failed experiment. In contrast to my 22rf there was no comparison, especially at 150Y. 

Take it a step further and my tiny 20 caliber centerfire cartridge varmint rifle is way better than the 22rf at distance and is affected by wind even less.

It comes down to BC, velocity(mostly), and how tight the gun shoots. Though pellets seem to wack out at a more accelerated rate than bullets do so there is this additional problem. Go look at the EBR benchrest threads to see how much better a pellet gun shoots at 75Y vs 100Y!

Yep I'd go for slugs in your case and settle for 1.5 moa in calm conditions. If your gun puts 4 into 1/2" at 100Y and one goes out high or low making a 1.5" group, and this happens often, you don't have 1/2" gun, you have a 1.5" gun, just sayin. If only I had a 2" PCP using slugs at 150Y, oh boy !

The internet = if it seems too good to be true then it probably isn't true. Don't let cherry picked groups in calm conditions make you feel bad, and that's if some of these people are even telling the truth...... Now if a person is shooting $4000 air rifles, off perfectly steady benches, with super nice rests, and shows a bunch of 247 to 250 score BR cards at 50Y, well that's believable. Or on that vane if they prove themselves in other shooting disciplines.

Buy an old unregulated (PRE smooth twist Lothar Walther) 22 FX Tarantula long version (typically sells for around $500-$550 shipped) and try 18.1gr JSB and the AA and Edgun and FX version which one the gun actually prefers.

You be surprised how accurate it is at 150 yards compared to any modern day high end regulated gun.

The RWS 54 and 56 spring guns too.

Repeatable long range accuracy (for me is 100 yards) is what keeps me interested in this sport. Its kind of like chasing big foot though. I really enjoy slugs, but a well placed shot with a pellet at the same distance is even more rewarding. Good luck with attaining your goal with that new barrel