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Johnnys_Worx

Johnnys_Worx

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Dec 3, 2024
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Belchertown, Ma, USA
So my wife just gave me a early Christmas present.. it's a hatsan Neutron Star 25cal. Has a ATN Xsight 4pro scope with ABL1500, has a cv life bipod, fx chrono v2, donnyfl sumo moderator, and ir950 light. It's a sweet set up...But they say this gun likes slugs. I've tried a bunch of them ranging from 28gr to 40gr...non of them were accurate on target. I'm dead 0@30yds with the JSB 33.49gr ex king heavy mki. with dime sized groups. But slugs? ALL OVER The place... Yet I see reviews saying it really likes them, but in a .22cal ...does anyone have any ideas for a 25cal. ? In this gun ...

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Many a Turkish made pcp can be rather picky on slugs as far as size.
In 25cal sorry to say there´s rather few flavors to pick from, but start by pushing one of them 33,95´s through the bore with the barrel off the gun and then take a micrometer to it to get an idea of your bore measurements.

Also be aware they can react rather violent as far as accuracy depending on weight/length.

Last but not least, try sans any and all moderators/diffusors and so forth to rule baffle whip out.
 
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Racing said:
Many a Turkish made pcp can be rather picky on slugs as far as size.
In 25cal sorry to say there´s rather few flavors to pick from, but start by pushing one of them 33,95´s through the bore with the barrel off the gun and then take a micrometer to it to get an idea of your bore measurements.

Also be aware they can react rather violent as far as accuracy depending on weight/length.

Last but not least, try sans any and all moderators/diffusors and so forth to rule baffle whip out.
Click to expand...
What exactly am I looking for when I mic the bore? What's the purpose of it? I did notice the slugs would ricochet more when it was a heavier grain. So I can understand the more violent comment.
 
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Racing said:
Many a Turkish made pcp can be rather picky on slugs as far as size.
In 25cal sorry to say there´s rather few flavors to pick from, but start by pushing one of them 33,95´s through the bore with the barrel off the gun and then take a micrometer to it to get an idea of your bore measurements.

Also be aware they can react rather violent as far as accuracy depending on weight/length.

Last but not least, try sans any and all moderators/diffusors and so forth to rule baffle whip out.
Click to expand...
Not all barrels like slugs. If there is a well made pellet that is very accurate, stick with it. However, you can get clipping with certain barrel and moderator combinations. Try the slugs without the moderator to see what happens.
 
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Johnnys_Worx said:
I did that already both with the mod on and off. Didn't make any difference.. plus the mod is slightly oversized..it's actually for a .30cal to prevent clipping.. but either way, was no change. That was actually my first thought too..iv herd moderators can do that. So it was my first test.
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How fast are the 34gr pellets moving? And what size slugs have you tried? Slugging the barrel with the pellet will help you see kind of what's going on in your barrel. You could have a barrel with rough grooves or uneven sections inside (tight or loose spots) pellets have much wider skirts than the pellet head so your slugs are likely undersized. Pushing a pellet through snd getting the diameter afterwards should help you figure out what sized slug you need.
 
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No I tried H&N branded slugs. All different weights. Started at 24gr. Then 30, 34, 38,40,&44... None were accurate on target.. H&N is all I could get at the time.. I have to order and wait a week or two to get other brands ..but haven't gotten to that point yet.. I don't want to keep buying all sorts of brands just to find they don't work...
 
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Hateful McNasty said:
So.... Your saying them perfect slug gun vids are incorrect?🤔 ( Then there .22 not .25)

I think it's a nice gun . Just shoot and tune and things may fall into place nicely ..
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Well it's looking like it...the YT reviews show a .22 being a slug gun...I'd assume the .25 would be too?? That's why I was asking if anyone knew of a slug that does work in a .25 cal...
 
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Johnnys_Worx said:
Well it's looking like it...the YT reviews show a .22 being a slug gun...I'd assume the .25 would be too?? That's why I was asking if anyone knew of a slug that does work in a .25 cal...
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I understand .. been there on one or two . Then had one or 2 start out kinda disappointing but now after time and shooting are pretty darn good . Maybe a little shooting and TLC will bring out it's best soon ..
 
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You measure the diameter of the pill shoved through the bore to get an exact measurement of what grooves n lands tell.
Now.
For a gun sporting a choke this means that you first up remove the small o-ring within the breech, that´s there to seal vs the probe.
This just not to ruin it as you use a few pills to get an idea of the barrel.

That one out of there push a pill down the bore until you feel resistence increase. Stop. Wrap a piece of tape around the cleaning rod where it sits, this will be the start of your choke point. Now push that pill all the way through out the muzzle and toss it in the scrap bin.

Now shove yet another such diabolo pill down the bore until just short of your tape mark. Bring the cleaning rod out, shove it in the muzzle end, taking care not to nick the muzzle crown, and shove said pill out backwards. Set this pill aside.
Repeat so you´ve got 2-5 such pills to measure from.

Now do exactly the same thing but this time shove the pill all the way down the bore out the muzzle. Again, wise move using more than one.

As you take a micrometer to this is soon becomes evident to you what minimum slug diameter you need for the slug to engage the rifling. Be aware that "modern" rifling isn´t especially deep.
Ditto. Measuring the "all the way through" pills gives you a very good idea on to what extent the choking action runs. To much of it can very well ruin a barrel for slug use.

If memory serves though the barrel on your Neutron Star is a Lothar Walter one already from the get go.

To hand an idea ontopic.
Had a brand new Reximex Zone in 22cal. Rex barrels are normally "large" within.
Just used regular JSB Knockouts to check what gives, as they are cheap and commonly available in 216/217 and 218 flavor.

Using 216s i had groups the size of a barn door approx.
217´s in turn, it started to group on paper... say 2.5" at 50 meters.
218´s turned it into a friggin laser.

What i´m getting at is that it´s the small things that often plays big differences. To my knowledge though 25cals don´t have that same "array" of flavors as do 22cal, but.. it´s getting there. To this day the most common are 249 and 250. But still.. that difference alone might very well be the difference between bloody awful and usable.
 
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rcrochte said:
Not all barrels like slugs. If there is a well made pellet that is very accurate, stick with it. However, you can get clipping with certain barrel and moderator combinations. Try the slugs without the moderator to see what happens.
Click to expand...
True.
Most do though, with a bit of detective work invested.
These days most of the both Chinese n Turkish crop guns offered run at least semi fast twists at the very least, which from a twist aspect will work with most commonly available slugs.
However.
As you bring up, and ain´t that the truth, some barrels simply won´t take to them.

To my findings this can often be traced to the actual choke. Some brands runs INSANE amounts of the stuff, which of course will throw about anything solid passing through off.

There´s a third option here too though, sorry to say, and that is that the stock Hatsan barrel can be a crap game, at best. I´ve even had them in the door machined from the wrong end!
Yes. The choke first thing after the chamber...
Their QC is an absolute joke.
When you get one that shoots well though.. do they ever.
 
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I've never heard of Hatsan till I got it. My wife thought it would be a great gift. She knows nothing of PCP guns. I know only a little myself. I've been you tubing the crap out of this stuff and googling every night too tryin to learn what I can. Sucks that there really isn't anyone around me that has experience in PCP. I suffer from dyslexia and ADD so learning my reading or watching a vid takes me a while. Hands on tho, I'll learn in now time.. but no one to show me. So I turn to you fabulous people's...

You would think there was a baseline for each gun that just works. Based on people's hands on experience. Rather than experimenting to find what does and doesn't work. I get each gun is different from the next, but I'd like to think that if they are machine made, that they would have almost identical results from one to the next. Hand made, I can understand being different than the next because human error.
 
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Racing said:
True.
Most do though, with a bit of detective work invested.
These days most of the both Chinese n Turkish crop guns offered run at least semi fast twists at the very least, which from a twist aspect will work with most commonly available slugs.
However.
As you bring up, and ain´t that the truth, some barrels simply won´t take to them.

To my findings this can often be traced to the actual choke. Some brands runs INSANE amounts of the stuff, which of course will throw about anything solid passing through off.

There´s a third option here too though, sorry to say, and that is that the stock Hatsan barrel can be a crap game, at best. I´ve even had them in the door machined from the wrong end!
Yes. The choke first thing after the chamber...
Their QC is an absolute joke.
When you get one that shoots well though.. do they ever.
Click to expand...
That's a good point on the barrels. I only have one Hatsan (flashpup .25). Haven't found a slug it will shoot without being all over the paper. But it loves JSB 33.95 diabolo exact. 1/2" inch groups at 50 all day long. I have taken dove at 85 yds off hand without trying to hard. It's been a good gun, it's just particular to one pellet.
 
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