GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: Atom on March 15, 2022, 05:53:58 PM
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RTI is going a step further, I think the chef of this soup is Gregor Kamenšek
https://youtu.be/0RXkcsGfpqg?t=108
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RTI is going a step further, I think the chef of this soup is Gregor Kamenšek
https://youtu.be/0RXkcsGfpqg?t=108
Jeepers! I want a 100fpe .22! :o
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Now why did ya have to go show that off! Oh brother, almost 300fpe in 357/9mm wow. I bet these things will be pretty spendy.
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That sounds like a properly built bullet shooter. I wonder what barrels and twist rates they'll be using? A 100 fpe .22 is rather simple thing to do, there are many such guns on this forum including mine. The problem at these power levels is to find right barrel to ammo combo, as an example a .22 at 100 fpe means 40 grainers shooting at 1060 fps which is a bit high and would need 16" twist. 44 grainers (225438) would do nicely at 1010 fps but may require 14-15" twist to work. 47 grain ammo (225420) would work at 980 fps and 12.6" twist and that 12.6" twist would just about support 55 grain bullets (Lee 225-55-RF) at 905 fps. Now if we talk about .25 at 150 fpe things get even worse, we have 18" twist airgun barrels and 10" twist .25 ACP barrels and a rather limited choice of bullets. A .257 on the other hand would be a great choice for 150 fpe gun with 14" twist barrels and matching 72-86 grain bullets available.
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That sounds like a properly built bullet shooter. I wonder what barrels and twist rates they'll be using? A 100 fpe .22 is rather simple thing to do, there are many such guns on this forum including mine. The problem at these power levels is to find right barrel to ammo combo, as an example a .22 at 100 fpe means 40 grainers shooting at 1060 fps which is a bit high and would need 16" twist. 44 grainers (225438) would do nicely at 1010 fps but may require 14-15" twist to work. 47 grain ammo (225420) would work at 980 fps and 12.6" twist and that 12.6" twist would just about support 55 grain bullets (Lee 225-55-RF) at 905 fps. Now if we talk about .25 at 150 fpe things get even worse, we have 18" twist airgun barrels and 10" twist .25 ACP barrels and a rather limited choice of bullets. A .257 on the other hand would be a great choice for 150 fpe gun with 14" twist barrels and matching 72-86 grain bullets available.
I think that this model will not be released until next year, until then more new types of slugs will probably be released. H&N as a large manufacturer has already started working heavy slugs and JSB has also announced the production of heavy slugs,let’s not forget the NSA. Altaros can easily produce any form of Turned Lead Slugs, there are a number of smaller manufacturers on the market and presses and molds for home production of slugs are coming, so this game continues
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That sounds like a properly built bullet shooter. I wonder what barrels and twist rates they'll be using? A 100 fpe .22 is rather simple thing to do, there are many such guns on this forum including mine. The problem at these power levels is to find right barrel to ammo combo, as an example a .22 at 100 fpe means 40 grainers shooting at 1060 fps which is a bit high and would need 16" twist. 44 grainers (225438) would do nicely at 1010 fps but may require 14-15" twist to work. 47 grain ammo (225420) would work at 980 fps and 12.6" twist and that 12.6" twist would just about support 55 grain bullets (Lee 225-55-RF) at 905 fps. Now if we talk about .25 at 150 fpe things get even worse, we have 18" twist airgun barrels and 10" twist .25 ACP barrels and a rather limited choice of bullets. A .257 on the other hand would be a great choice for 150 fpe gun with 14" twist barrels and matching 72-86 grain bullets available.
I think that this model will not be released until next year, until then more new types of slugs will probably be released. H&N as a large manufacturer has already started working heavy slugs and JSB has also announced the production of heavy slugs,let’s not forget the NSA. Altaros can easily produce any form of Turned Lead Slugs, there are a number of smaller manufacturers on the market and presses and molds for home production of slugs are coming, so this game continues
Bullets are easy, you can even make your own molds for your chosen bullet design and cast them. The limit comes from available barrel twists for each caliber. .22 has much more variety (from 7" twist to 18") although we need to remember that airgun barrels are .217-.218 while rimfire is about .221 and centerfire .224 so bullets must be sized accordingly. It will be very interesting to see where all this leads to, a .22 shooting 0.14+ BC bullets at 100+ fpe would make it better than a .22lr for subsonic area. If we can get .25 airgun barrels at around 14" twist that would open up the possibility to shoot 0.18+ BC slugs from a smallbore. I've actually shot my .257 against my .22lr Anschutz 54 at 100M and .257 makes tighter groups ...
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I personally prefer the conventional style hunting rifle myself, I'll be using my AEA Challenger .22 in the woods later this morning.
At room temp over the chrony it will produce as much as 70fpe using my cast 24.4g slugs, very accurate too. I did watch that video some time ago about those guns.
(https://i.imgur.com/aP4HgRH.png)
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Here it is right from Gregor ;)
https://youtu.be/F4Y-EAdf-CI
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I have an RTI Prophet Performance .22 - it has the Lothar Walther barrel that was custom designed between LW and RTI.
The barrel has a slow 32:1 twist rate. This barrel was specifically designed to win bench rest competitions at 50, 75 and 100 yards shooting JSB Monster Redesigned pellets at high velocities (above 1,000 fps). The combination of slow pellet spin rate with stability at high velocity with a heavy pellet provides advantages with wind.
I have the hammer spring backed almost all the way out and the regulator set at only 80 bar. At these extremely mild settings, it shoots JSB 18.13g at 899-902 fps - and it is INSANELY accurate. It is more consistently accurate than my Daystate Huntsman .22 and my Weihrauch HW110 .22 and an FX Maverick .22 that I no longer have (because the Prophet is essentially the same type of platform and I liked the performance of the Prophet better). The Prophet is also a super simple platform to maintain, I believe it has a total of 8 o-rings.
It seems that RTI is now going after the slug shooter market with this new prototype. Based on my experience with the Prophet, I have no doubt that they will achieve their target FPE numbers. RTI seems really engineering-focused (as opposed to marketing-focused) at this point in the company’s evolution.
I have no need for a 100+ FPE gun (target shooter primarily) and I don’t want to shoot slugs - so I’m not the target market for this new prototype. But I’m interested in watching its development because it seems to be the baddest airgun on the planet and RTI stuff just works - not finicky at all.
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Ed,
Thanks for that rundown. I ordered a performance in 22 a couple days ago. What you describe is exactly the reason I went with RTI instead of fx. I’m excited to get to find out for myself how it performs.
Dave
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Ed,
Thanks for that rundown. I ordered a performance in 22 a couple days ago. What you describe is exactly the reason I went with RTI instead of fx. I’m excited to get to find out for myself how it performs.
Dave
Let me know how you like it. I’d also be interested in what weight pellet you shoot with it. I’ve got about 1,000 JSB Monster Redesigneds that I’m saving until I get out to my brothers where I can shoot out to 100 yards and beyond. The Prophet Performance is super mild mannered shooting JSB 18.13s at low 900s fps. I tend to single load pellets as it’s so easy to do with this gun - but the magazines work great too. I may try bumping the speed of the 18.13s up to 950-60 fps and see how it groups.