RTI Rti Mora 600mm 25 cal

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some pics of the phutphut,muzzle end without the moderator, hopefully its arriving soon
IMG_20250118_140858.jpg


not a heavy weight slug shooter yet,but hopefully can find the cause of it having the flu
IMG_20250118_140928.jpg
 
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Just a thought. My Mora is shooting 37gr .25 slugs at 980fps on a 134bar reg pressure. Its known that the same weight slug/pellet in a bigger caliber requires less pressure but more volume then a smaller caliber due to its bigger surface area. (Same pressure on a larger surface means higher force) Your reg pressure isn't that much higher then mine. Could you try upping the reg pressure?

I really don't understand why your velocity starts to drop at a certain point. Maybe try lowering the hammer spring tension? Just guessing here. If the hammer spring is to high. Maybe the valve is being over powered which makes it function like normal "smack to open valve" it might be bouncing back?? I really am guessing here . Don't know if this is even possible?
 
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If upping the reg pressure or lowering the hammer spring tension isn't working i am thinking about as few causes that could affect the velocity.

- leaking probe O-ring. The know for sure. Single load a pellet/slug. Close the cocking handle completely and keep your finger on the probe during the shot. If you feel a blast of air during the shot. The O-ring is busted. You can't do this without a projectile loaded. You need the back pressure of the shot.

- sticking valve. Take out the valve assembly, clean it, relube it with thin silicon oil and reinstall.

If the regs are stable. Then i wouldn't search for malfunctions on that side of the rifle
 
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Droogmole said:
Here are a few pics of the valve assemble to help you out

If you need more pictures or clos-ups. Just ask. I made a lot of pictures for future reference when i need to trouble shoot my own Mora





Click to expand...
it might be worth having a look at that valve,its still under warranty as i have only had it a month.
does the whole valve come out at the trigger end and does the black threaded part come out the opposite end

hopefully Rok doesnt mind me checking it out

i can get higher fps with bumping the reg to 180 bar,but the shot count is low going from 300 fill to 220
 
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Bumping up the reg pressure doesn't have to mean lower shot count. A higher reg pressure means there is less time needed to get the projectile up to speed. Which translates to a shorter dwelltime and less volume of air under pressure used

To take out he valve assembly you can do it like this

Degass the rifle by unscrewing the little allen screw just
above the reg gauge.

Leave the dwell time screw in its place and unscrew the black threaded nut. On mine the valve assemble came out except the valve seat. This one is held in place be a allen screw seated just below the pin probe. Its screwed in at a little angle. Unscrew it.

To take out the hammer and spring assemble via the back end of the buttstock. You can remove the rubber plate holder by unscrewing the 4 countersunk allen bolds.
Then using a 6mm allen key you can unscrew the hammer spring tension nut. Take out the hammer and spring assemble.
To push out the valve seat. Use a long piece of plastic or something that is softer then the material of the seat.
And stick it in the back of the rifle. With a little effort the valve will come out via the same way as the whole valve assemble.

When reassembling just make sure you place the valve seat in the right orientation. The square holes and flat surface should face upwards towards the barrel.
 
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found the issue,looks as if the importer has indeed put a part sub 12 tune on it.by turning the valve seat to the restrict side.
thanks droogmole and Rok for the help and suggestions

IMG_20250119_125853.jpg


the valve train looks as if its been modified in the newer versions compared to your one droogmole

IMG_20250119_125802.jpg


so quick retest and its in ballpark of where it should be,just need to work on the consitancy now.

mora 34g 140 bar reg

H&N Heavy Slug .22 Slug 34.0 gr

Shot count: 32
Low: 939
Hi: 967
Avg: 955
STD Dev: 8
Spread: 28

1/19/25 2:41:08 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:41:23 PM,956,FPS,69.0,FT Lbs,
1/19/25 2:41:33 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:41:44 PM,953,FPS,68.6,FT Lbs,
1/19/25 2:41:57 PM,960,FPS,69.6,FT Lbs,
1/19/25 2:42:13 PM,953,FPS,68.6,FT Lbs,
1/19/25 2:43:12 PM,965,FPS,70.3,FT Lbs,
1/19/25 2:43:28 PM,949,FPS,68.0,FT Lbs,
1/19/25 2:45:26 PM,946,FPS,67.6,FT Lbs,
1/19/25 2:45:44 PM,946,FPS,67.6,FT Lbs,
1/19/25 2:46:03 PM,956,FPS,69.0,FT Lbs,
1/19/25 2:46:23 PM,942,FPS,67.0,FT Lbs,
1/19/25 2:46:40 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:47:36 PM,949,FPS,68.0,FT Lbs,
1/19/25 2:47:52 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:48:07 PM,965,FPS,70.3,FT Lbs,
1/19/25 2:48:47 PM,967,FPS,70.7,FT Lbs,
1/19/25 2:49:24 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:49:50 PM,951,FPS,68.3,FT Lbs,
1/19/25 2:50:12 PM,939,FPS,66.7,FT Lbs,
1/19/25 2:50:27 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:50:45 PM,946,FPS,67.6,FT Lbs,
1/19/25 2:51:03 PM,965,FPS,70.3,FT Lbs,
1/19/25 2:51:21 PM,958,FPS,69.3,FT Lbs,
1/19/25 2:51:36 PM,960,FPS,69.6,FT Lbs,
1/19/25 2:51:48 PM,967,FPS,70.7,FT Lbs,
1/19/25 2:52:01 PM,953,FPS,68.6,FT Lbs,
1/19/25 2:56:21 PM,958,FPS,69.3,FT Lbs,
1/19/25 2:56:46 PM,949,FPS,68.0,FT Lbs,
1/19/25 2:57:03 PM,949,FPS,68.0,FT Lbs,
1/19/25 2:57:21 PM,944,FPS,67.3,FT Lbs,
1/19/25 2:57:39 PM,951,FPS,68.3,FT Lbs,

thanks for all the help droogmole and Rok, great to see the maker get involved and back their product.
just that i think Rok needs a new importer or better training for them:)
and the importer is due me 3 tins of slugs that ive waisted.
 
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turbospud said:
found the issue,looks as if the importer has indeed put a part sub 12 tune on it.by turning the valve seat to the restrict side.
thanks droogmole and Rok for the help and suggestions

View attachment 530588

the valve train looks as if its been modified in the newer versions compared to your one droogmole

View attachment 530589

so quick retest and its in ballpark of where it should be,just need to work on the consitancy now.

mora 34g 140 bar reg

H&N Heavy Slug .22 Slug 34.0 gr

Shot count: 32
Low: 939
Hi: 967
Avg: 955
STD Dev: 8
Spread: 28

1/19/25 2:41:08 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:41:23 PM,956,FPS,69.0,FT Lbs,
1/19/25 2:41:33 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:41:44 PM,953,FPS,68.6,FT Lbs,
1/19/25 2:41:57 PM,960,FPS,69.6,FT Lbs,
1/19/25 2:42:13 PM,953,FPS,68.6,FT Lbs,
1/19/25 2:43:12 PM,965,FPS,70.3,FT Lbs,
1/19/25 2:43:28 PM,949,FPS,68.0,FT Lbs,
1/19/25 2:45:26 PM,946,FPS,67.6,FT Lbs,
1/19/25 2:45:44 PM,946,FPS,67.6,FT Lbs,
1/19/25 2:46:03 PM,956,FPS,69.0,FT Lbs,
1/19/25 2:46:23 PM,942,FPS,67.0,FT Lbs,
1/19/25 2:46:40 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:47:36 PM,949,FPS,68.0,FT Lbs,
1/19/25 2:47:52 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:48:07 PM,965,FPS,70.3,FT Lbs,
1/19/25 2:48:47 PM,967,FPS,70.7,FT Lbs,
1/19/25 2:49:24 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:49:50 PM,951,FPS,68.3,FT Lbs,
1/19/25 2:50:12 PM,939,FPS,66.7,FT Lbs,
1/19/25 2:50:27 PM,963,FPS,70.0,FT Lbs,
1/19/25 2:50:45 PM,946,FPS,67.6,FT Lbs,
1/19/25 2:51:03 PM,965,FPS,70.3,FT Lbs,
1/19/25 2:51:21 PM,958,FPS,69.3,FT Lbs,
1/19/25 2:51:36 PM,960,FPS,69.6,FT Lbs,
1/19/25 2:51:48 PM,967,FPS,70.7,FT Lbs,
1/19/25 2:52:01 PM,953,FPS,68.6,FT Lbs,
1/19/25 2:56:21 PM,958,FPS,69.3,FT Lbs,
1/19/25 2:56:46 PM,949,FPS,68.0,FT Lbs,
1/19/25 2:57:03 PM,949,FPS,68.0,FT Lbs,
1/19/25 2:57:21 PM,944,FPS,67.3,FT Lbs,
1/19/25 2:57:39 PM,951,FPS,68.3,FT Lbs,

thanks for all the help droogmole and Rok, great to see the maker get involved and back their product.
just that i think Rok needs a new importer or better training for them:)
and the importer is due me 3 tins of slugs that ive waisted.
Click to expand...
Your welcome! Good to read that you finally get the results you are looking for.

Very interesting to see a complete redisigned valve system. Longer spring, longer valve cilinder and smaller valve piston. Also different material valve seat. Wonder why RTI did that. I have zero issues with the current valve.
 
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Droogmole said:
Your welcome! Good to read that you finally get the results you are looking for.

Very interesting to see a complete redisigned valve system. Longer spring, longer valve cilinder and smaller valve piston. Also different material valve seat. Wonder why RTI did that. I have zero issues with the current valve.
Click to expand...
maybe so the same valve system can be used for different power levels in different markets.

seems well made parts compared to other guns i have.
 
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You might be right. Only RTI knows :)

The longer cilinder and smaller piston makes me think the valve will be a bit easier to fine tune. Just guessing.

The Mora certainly looks like its build to withstand the test of time. Its beautifully engineerd and well build.

Keep us posted on you further experiences in the tuning part please.
 
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Droogmole said:
You might be right. Only RTI knows :)

The longer cilinder and smaller piston makes me think the valve will be a bit easier to fine tune. Just guessing.

The Mora certainly looks like its build to withstand the test of time. Its beautifully engineerd and well build.

Keep us posted on you further experiences in the tuning part please.
Click to expand...
will do,should be easier to tune now;)

Rok does read up on here so we will be kept right(y)
 
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turbospud said:
as you and shaman are on here,its proberly easier to post here than mess up shamans youtube channel.

chrono info
mora 34g using 170 bar

H&N Heavy Slug .22 Slug 34.0 gr

Shot count: 5
Low: 895
Hi: 914
Avg: 904
STD Dev: 6
Spread: 19

1/12/25 1:49:59 PM,902,FPS,61.5,FT Lbs,
1/12/25 1:50:20 PM,914,FPS,63.1,FT Lbs,
1/12/25 1:50:44 PM,905,FPS,61.8,FT Lbs,
1/12/25 1:51:08 PM,895,FPS,60.5,FT Lbs,
1/12/25 1:51:48 PM,902,FPS,61.5,FT Lbs,

it was supplied set at 140 bar and with the hammer plate blocked off and anti tamper screws fitted which on an fac gun doesnt seem right.
View attachment 528940
have tried droogmoles set up procedure and even at 185 bar it only gets 940 fps with 217 34g.

suggestions on what i can try or should look at next much appreicate
Click to expand...

turbospud said:
as you and shaman are on here,its proberly easier to post here than mess up shamans youtube channel.

chrono info
mora 34g using 170 bar

H&N Heavy Slug .22 Slug 34.0 gr

Shot count: 5
Low: 895
Hi: 914
Avg: 904
STD Dev: 6
Spread: 19

1/12/25 1:49:59 PM,902,FPS,61.5,FT Lbs,
1/12/25 1:50:20 PM,914,FPS,63.1,FT Lbs,
1/12/25 1:50:44 PM,905,FPS,61.8,FT Lbs,
1/12/25 1:51:08 PM,895,FPS,60.5,FT Lbs,
1/12/25 1:51:48 PM,902,FPS,61.5,FT Lbs,

it was supplied set at 140 bar and with the hammer plate blocked off and anti tamper screws fitted which on an fac gun doesnt seem right.
View attachment 528940
have tried droogmoles set up procedure and even at 185 bar it only gets 940 fps with 217 34g.

suggestions on what i can try or should look at next much appreicated
Click to expand...
Bonsoir, pour mes publications sur la Mora, je les ai déjà misent sur ce forum dans un autre sujet sur la Mora. Ensuite je partage mais résultats sans gêner qui que ce soit, c'est le principe des forums.
Pour ta Mora avec ces visses bloquantes c'est trop bizarre. Surtout que logiquement c'est une partie réglable. Après ce n'est pas le réglage du marteau qui va augmenter la vitesse (nous ne sommes pas chez FX)
Je sais que depuis mon modèle reçu, RTI à mis une nouvelle main valve dans les derniers modèles envoyés. Si après il y a des pertes de puissance c'est dommage. Mes résultats par chance je les ai filmé avec les altaros en 40g avec la Mora standard et le chrony V2 .
En ce moment je teste la Epic One avec plaisir en attendant qu'il y ait du stock plus tard chez RTI pour la Mora Sniper.
 
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Fodzy le Geek said:
Bonsoir, pour mes publications sur la Mora, je les ai déjà misent sur ce forum dans un autre sujet sur la Mora. Ensuite je partage mais résultats sans gêner qui que ce soit, c'est le principe des forums.
Pour ta Mora avec ces visses bloquantes c'est trop bizarre. Surtout que logiquement c'est une partie réglable. Après ce n'est pas le réglage du marteau qui va augmenter la vitesse (nous ne sommes pas chez FX)
Je sais que depuis mon modèle reçu, RTI à mis une nouvelle main valve dans les derniers modèles envoyés. Si après il y a des pertes de puissance c'est dommage. Mes résultats par chance je les ai filmé avec les altaros en 40g avec la Mora standard et le chrony V2 .
En ce moment je teste la Epic One avec plaisir en attendant qu'il y ait du stock plus tard chez RTI pour la Mora Sniper.
Click to expand...
my one is now producing full power,rti most likely send them to the uk choked off to keep to the uk limits.
the importer had not reversed the valve or the hammer restrictions to suit the license i have.
i think your video showed you had to alter the valve too.
the 34g hn are proving to be very accuate at 970 fps with almost no wind drift affecting them,it was a one hole gun yesterday at 100 meters
of the 10 shots,5 were in the bull, the rest doted around it
the gun outshoots me
 
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