New slugs Altaros ATP Queen .25 60g - BC 0.245 - suitable for FX Panthera magazine
- Thread starter Altaros
- Start date
interesting !!It looks like this new and promising PCP platform could successfully propel this missile
Upvote 0
the most recent measurement:
50gr ATP Smooth .25 BC G1 0.237 G7 0.111 MV 907 fps -0.3C 994 mBar
60gr ATP Queen .25 BC G1 0.247 G7 0.128 MV 824 fps 1.3C 1016 mBar
67gr ATP King .25 BC G1 0.247 G7 0.132 MV 798 fps 1.3C 1016 mBar
Difference in % when comparing Ballistic Coefficient for G1 function -5% 50gr vs 60 or 67gr
Difference in % when comparing Ballistic Coefficient for G7 function -14% 50gr vs 60 or -16% vs 67gr
This is for measurements from the Labrador to about 30-40m, when in general the BC is larger, as it decreases with distance, so it is already different for distances of 300-400m. At the same time, a higher MV means a higher BC, so from a shape point of view, BC should be compared at the same speeds.
In real I used BC for 50gr ATP Smooth G7 0.102 and G7 0.118 for ATP Queen ( this number is still in the process of being refined) and G7 0.12 for 67gr ATP King.
At slower muzzle velocity (MV) and at a higher temperature, I previously measured G1 for ATP Smooth .25 around 0.21, that's why we put it on the package, because we prefer to give data that people would rather measure with smaller powerful rifles.
However, it can be seen here that the G1 function does not correspond, as heavier and longer bullets can have a similar function to G1 but a different function to G7 and the result for G7 is even more logical.
At larger distances of 250-350m, the wind deviation can be 1/4 more for ATP Smooth compared to ATP King or Queen and that is often exactly the difference between hitting and missing the target.
For super long shootings I use 57gr .22 with a length of 15.4mm where the BC after + 1km disanc is real G7 0.134.
At these distances there is practically no point in using the 40gr ATP King .22 because the BC is too small ( still the best BC on the .22 market over competitive slugs other manufacturer)
50gr ATP Smooth .25 BC G1 0.237 G7 0.111 MV 907 fps -0.3C 994 mBar
60gr ATP Queen .25 BC G1 0.247 G7 0.128 MV 824 fps 1.3C 1016 mBar
67gr ATP King .25 BC G1 0.247 G7 0.132 MV 798 fps 1.3C 1016 mBar
Difference in % when comparing Ballistic Coefficient for G1 function -5% 50gr vs 60 or 67gr
Difference in % when comparing Ballistic Coefficient for G7 function -14% 50gr vs 60 or -16% vs 67gr
This is for measurements from the Labrador to about 30-40m, when in general the BC is larger, as it decreases with distance, so it is already different for distances of 300-400m. At the same time, a higher MV means a higher BC, so from a shape point of view, BC should be compared at the same speeds.
In real I used BC for 50gr ATP Smooth G7 0.102 and G7 0.118 for ATP Queen ( this number is still in the process of being refined) and G7 0.12 for 67gr ATP King.
At slower muzzle velocity (MV) and at a higher temperature, I previously measured G1 for ATP Smooth .25 around 0.21, that's why we put it on the package, because we prefer to give data that people would rather measure with smaller powerful rifles.
However, it can be seen here that the G1 function does not correspond, as heavier and longer bullets can have a similar function to G1 but a different function to G7 and the result for G7 is even more logical.
At larger distances of 250-350m, the wind deviation can be 1/4 more for ATP Smooth compared to ATP King or Queen and that is often exactly the difference between hitting and missing the target.
For super long shootings I use 57gr .22 with a length of 15.4mm where the BC after + 1km disanc is real G7 0.134.
At these distances there is practically no point in using the 40gr ATP King .22 because the BC is too small ( still the best BC on the .22 market over competitive slugs other manufacturer)
Upvote 0
Hmm 
wonder if I should have ordered some of the 50gr slugs 
Allen
wonder if I should have ordered some of the 50gr slugs Boy it's gotta be hard to push a 57 gr inside a .22 Barrel. At what speed do you fire those off at and will you make them available since the panthera is out?
Allen
Upvote 0
inserting them into the barrel is as easy as the 40gr ATP King .22, as they are practically no different from them. With the right technology (CNC machining) nothing is impossible, for example the relief (grove) between both ends, which is the only thing that adds to the resistance when inserting into the barrel. When this material is removed, there is practically no difference between the two bullets in terms of resistance to insertion into the barrel. Currently I shoot them 270 m/s 885 fps but soon we will be able to add on speed.
The panthera may be out, but in order for it to be able to shoot 15.4mm 57gr .22 it would have to grow from a child's toy to a proper weapon
Firstly, it does not have a 15.4mm magazine, and secondly, it does not have a usable 1:8 twist barrel.
Take it a bit jokingly, but it's just a fact
The panthera may be out, but in order for it to be able to shoot 15.4mm 57gr .22 it would have to grow from a child's toy to a proper weapon
Firstly, it does not have a 15.4mm magazine, and secondly, it does not have a usable 1:8 twist barrel.
Take it a bit jokingly, but it's just a fact
Last edited:
Upvote 0
In my 700mm Panthera .25 without the Tungsten hammer I am able to shoot the 66gr Kings at 830fps. They are showing good accuracy so far, I only put one mag of them thru the gun so far. And I was able to get them to fit in Orions mags. I just sanded down the lip on the cover and they fit and work great in it. I just got the Tungsten hammer but have not installed it in my .25 yet.
Upvote 0
But now they make the Queen, so there you go. Approx same BC, 60 grains and fits in mags without mods.
Upvote 0
It will definitely take a while before someone makes a 1:8 barrel twist for the Pantera but with the aftermarket covers on the mags there should be enough room. If not I'm sure someone will or already has a single loader that would work.inserting them into the barrel is as easy as the 40gr ATP King .22, as they are practically no different from them. With the right technology (CNC machining) nothing is impossible, for example the relief (grove) between both ends, which is the only thing that adds to the resistance when inserting into the barrel. When this material is removed, there is practically no difference between the two bullets in terms of resistance to insertion into the barrel. Currently I shoot them 270 m/s 885 fps but soon we will be able to add on speed.
View attachment 336655
The panthera may be out, but in order for it to be able to shoot 15.4mm 57gr .22 it would have to grow from a child's toy to a proper weapon
Firstly, it does not have a 15.4mm magazine, and secondly, it does not have a usable 1:8 twist barrel.
Take it a bit jokingly, but it's just a fact
Allen
Upvote 0
I wonder if a dreamline single shot loader would work? The Panthera isn't too bad to single load as is.
Upvote 0
I haven't measured it but I made it to fit the Griffin 30 cal 78gr Boat tail slugs. His site says they are .5519 long. After sanding the lip I wouldn't go any farther. That would def. be the max unless they redesign the mag.
Upvote 0
Wow that's 14mm. I think i remembered the opening on the impact wrong it maynot be 15mm. And I thought the panthera magazine opening was even wider.
Allen
Allen
Last edited:
Upvote 0
I can measure the mag openings on both later and post here. I know that the 108gr 35 cal Nielson slugs will not fit in the Impact mags and they are .5 inches, the 93gr will and they are .448. So you can get longer slugs in the Panthera than you can in the Impact.
Upvote 0
I assume that is with a factory mag as many of the aftermarket mags allow longer slugs. The 22 javelin 40 gr slugs are 0.456 inches long and fit in the current version Elis5713 3d printed mags with some room to spare. This is with the impact. Single loaders allow even longer slugs.
Allen
Allen
Upvote 0
Yes that is with factory mags. I know I can fit the 40gr 22 cal Javelin slugs in he eagle vision mags and a few of the others.
Upvote 0
Sorry I think I got the mag opening wrong and have to remeasure. I it flipped around with something else. I believe it is 14mm magazine width. I will change the entry above but will definitely have to remeasure
Allen
Allen
Upvote 0
Hey looks who is here. Thanks Orion. Are you able to make it so the mags can hold a 14mm slug? I sanded down the lip on the cap to make it work for me?
Upvote 0
I just got home and I guess I was correct initially on the impact. It has a magazine opening of 15mm.
it's just that the ring on the transfer port that locates the magazine is almost a whole mm thick. Probably could notch that on the side if necessary.
So using a single shot loader I could probably get a 14mm slug in without notching the locating ring.
Allen
So using a single shot loader I could probably get a 14mm slug in without notching the locating ring.
Allen
Last edited:
Upvote 0